1,000,000,000

{{Redirect|Milliard|people with the surname|Milliard (surname)}}{{See also|Orders of magnitude (numbers)|Long and short scales}} {{pp-pc|small=yes}} {{Infobox number | number = 1000000000 | cardinal = One billion (short scale)<br/>One milliard (long scale)<br/>One thousand million | ordinal = One billionth (short scale) | factorization = {{hlist|2⁹|5⁹}} | roman = <span style="border-top:double 3px">M</span> }} {{Portal|Mathematics}} '''1,000,000,000''' ("one billion" on the short scale; "one milliard" on the long scale; one thousand million) is the natural number following 999,999,999 and preceding 1,000,000,001. With a number, "billion" can be abbreviated as '''b''', '''bil'''<ref>{{Cite web |title=Definition of BIL |url=https://www.merriam-webster.com/dictionary/bil |access-date=2024-12-16 |website=www.merriam-webster.com |language=en}}</ref> or '''bn'''.<ref>{{cite book |title=The Economist Style Guide |date=2015 |publisher=The Economist |edition=11th |chapter-url=https://books.google.com/books?id=enIZBwAAQBAJ&pg=PT70 |chapter=figures|isbn=9781782830917 }}</ref><ref name="EUStyleGuide">{{cite book |chapter=6.5 Abbreviating ‘million’ and ‘billion’ |title=English Style Guide: A handbook for authors and translators in the European Commission |url=https://ec.europa.eu/info/sites/info/files/styleguide_english_dgt_en.pdf |edition=8th |publisher=European Commission |date=3 November 2017 |page=32}}</ref>

In standard form, it is written as '''1 × 10⁹'''. The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is '''G'''.

One billion years may be called an ''eon'' in astronomy or geology.

Previously in British English (but not in American English), the word "billion" referred exclusively to a million millions (1,000,000,000,000). However, this is not common anymore, and the word has been used to mean one thousand million (1,000,000,000) for several decades.<ref>{{cite web |url=https://en.oxforddictionaries.com/explore/how-many-is-a-billion |archive-url=https://web.archive.org/web/20170112163426/https://en.oxforddictionaries.com/explore/how-many-is-a-billion |url-status=dead |archive-date=January 12, 2017 |title=How many is a billion? |website=OxfordDictionaries.com |access-date=13 November 2017}}</ref>

The term '''''milliard''''' could also be used to refer to 1,000,000,000; whereas "milliard" is rarely used in English,<ref>{{cite web |url=https://books.google.com/ngrams/graph?content=billion%2Cthousand+million%2Cmilliard&year_start=1808&year_end=2008&corpus=18&smoothing=3 |title=billion,thousand million,milliard |website=Google Ngram Viewer |access-date=13 November 2017}}</ref> variations on this name often appear in other languages.

In the Indian numbering system, it is known as 100 crore or 1 {{not a typo|arab}}.

1,000,000,000 is also the cube of 1000.

It is a common metric used in macroeconomics when describing national economies.

==Sense of scale== thumb|upright=1.8|Visualization of powers of ten from one to 1 billion The facts below give a sense of how large 1,000,000,000 (10⁹) is in the context of time according to current scientific evidence:

===Time===

* 10⁹ seconds (1 gigasecond) equal 11,574 days, 1 hour, 46 minutes and 40 seconds (approximately 31.7 years, or 31 years, 8 months, 8 days).<!-- A Gregorian calendar mean year is 365.2425 days; a gigasecond is 31 mean years plus ~251.56 days. Assuming an average month length of 30 5/12 days, this is 31 mean years, 8 months, and ~8.22 days. Using a less precise Julian year or a more precise average month changes this value by less than a day; because of the ambiguity, do not add a more precise value to the article text here. --> * About 10⁹ minutes ago, the Roman Empire was flourishing and Christianity was emerging. (10⁹ minutes is roughly 1,901 years.) * About 10⁹ hours ago, modern human beings and their ancestors were living in the Stone Age (more precisely, the Middle Paleolithic). (10⁹ hours is roughly 114,080 years.) * About 10⁹ days ago, ''Australopithecus'', an ape-like creature related to an ancestor of modern humans, roamed the African savannas. (10⁹ days is roughly {{Nowrap|2.738 million}} years.) * About 10⁹ months ago, dinosaurs walked the Earth during the late Cretaceous. (10⁹ months is roughly {{Nowrap|83.3 million}} years.) * About 10⁹ years—a gigaannus—ago, the first multicellular eukaryotes appeared on Earth. * About 10⁹ decades ago, the thin disk of the Milky Way started to form. (10⁹ decades is exactly {{Nowrap|10 billion}} years.) * The universe is thought to be about 13.8 × 10⁹ years old.<ref>{{cite web |url=http://www.esa.int/Our_Activities/Space_Science/Cosmic_detectives |title=Cosmic Detectives |date=2 April 2013 |website=European Space Agency}}</ref>

===Distance=== * 10⁹ inches is {{convert|15783|mi|km}}, more than halfway around the world and thus sufficient to reach any point on the globe from any other point. * 10⁹ metres (called a gigametre) is almost three times the distance from the Earth to the Moon. * 10⁹ kilometres (called a terametre) is over six times the distance from the Earth to the Sun.

===Area=== * A billion square inches could make a square about one half mile on a side. * A bolt of finely woven 1000-TC bed sheet linen with a billion thread crossings would have an area of {{convert|40|m2|sqyd}}, comparable to the floor area of a motel unit.

===Volume=== * There are one billion cubic millimetres in a cubic metre, and a billion cubic metres in a cubic kilometre. * A billion grains of table salt or granulated sugar would occupy a volume of about {{convert|2.5|cuft}}. * A billion cubic inches would be a volume comparable to a large commercial building slightly larger than a typical supermarket.

===Weight=== * Any object that weighs {{convert|1000000000|kg|lbs|spell=in}} would weigh about as much as 5,525 empty Boeing 747-400s. * A cube of iron that weighs {{convert|1000000000|lbs|kg|spell=in}} would be {{convert|38.62|m|ft}} on each side.

===Products=== * As of July 2016, Apple has sold one billion iPhones.<ref>{{cite web |url=https://www.nbcnews.com/business/consumer/apple-announces-it-has-sold-one-billion-iphones-n618171 |title=Apple Announces It Has Sold One Billion iPhones |last=Panken |first=Eli |date=27 July 2016 |website=NBCNews.com |access-date=22 April 2023}}</ref> This makes the iPhone one of the most successful product lines in history, surpassing the PlayStation and the Rubik's Cube. * As of January 2025, Facebook has 3.065 billion users.<ref>{{cite web |url=https://www.wsj.com/articles/facebook-posts-strong-profit-and-revenue-growth-1469650289 |title=Facebook Posts Strong Profit and Revenue Growth |last=Seethamaram |first=Deep |date=27 July 2016 |website=The Wall Street Journal |access-date=13 November 2017}}</ref>

===Nature=== * A small mountain, slightly larger than Stone Mountain in Georgia, United States, would weigh (have a mass of) a billion tons. * There are billions of worker ants in the largest ant colony in the world,<ref>{{cite web |url=https://www.atlasobscura.com/articles/how-the-world-became-a-giant-ant-colony |title=How the World Became A Giant Ant Colony |last=Burke |first=Jeremy |date=16 June 2015 |website=Atlas Obscura |access-date=13 November 2017}}</ref> which covers almost {{convert|4,000|mi|km}} of the Mediterranean coast. * In 1804, the world population was one billion.

===Count=== '''A''' is a cube; '''B''' consists of 1000 cubes the size of cube ''A'', '''C''' consists of 1000 cubes the size of cube ''B''; and '''D''' consists of 1000 cubes the size of cube ''C''. Thus there are {{Nowrap|1 million}} ''A''-sized cubes in ''C''; and 1,000,000,000 ''A''-sized cubes in ''D''.

frameless|upright=3.45

==Selected 10-digit numbers (1,000,000,000–9,999,999,999)== ===1,000,000,000 to 1,999,999,999=== * '''1,000,000,007''' : smallest prime number with 10 digits.<ref name="A003617">{{Cite OEIS|A003617|Smallest n-digit prime}}</ref> * '''1,000,006,281''' : smallest triangular number with 10 digits and the 44,721st triangular number.<ref name="A068093">{{Cite OEIS|A068093|Smallest n-digit triangular number}}</ref> * '''1,000,014,129''' = 31623², the smallest ten-digit square.<ref>{{Cite web |title=A061432 - OEIS |url=https://oeis.org/A061432 |access-date=2025-06-30 |website=oeis.org}}</ref> * '''1,003,003,001''' = 1001³. * '''1,026,753,849''' = 32043², the smallest pandigital square in base 10.<ref>{{cite OEIS|A225218|Square numbers containing all the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9}}</ref> * '''1,069,863,695''' : number of square (0,1)-matrices without zero rows and with exactly 9 entries equal to 1<ref>{{cite OEIS|A122400|Number of square (0,1)-matrices without zero rows and with exactly n entries equal to 1}}</ref> * '''1,073,741,824''' = 32768² = 1024³ = 64⁵ = 32⁶ = 8¹⁰ = 4¹⁵ = 2³⁰ * '''1,073,742,724''' : Leyland number using 2 and 30 (2³⁰ + 30²) * '''1,073,792,449''' : Leyland number using 4 and 15 (4¹⁵ + 15⁴) * '''1,093,104,961''' : number of (unordered, unlabeled) rooted trimmed trees with 28 nodes<ref name=A002955>{{cite OEIS|A002955|Number of (unordered, unlabeled) rooted trimmed trees with n nodes}}</ref> * '''1,096,671,326''' : number of uniform rooted trees with 26 nodes<ref name=A317712>{{cite OEIS|A317712|Number of uniform rooted trees with n nodes}}</ref> * '''1,104,891,746''' : number of partially ordered set with 12 unlabeled elements<ref>{{cite OEIS|A000112|Number of partially ordered sets (posets) with n unlabeled elements}}</ref> * '''1,111,111,111''' : repunit. * '''1,129,760,415''' : 23rd Motzkin number.<ref name=A001006>{{cite OEIS|A001006|Motzkin numbers}}</ref> * '''1,134,903,170''' : 45th Fibonacci number.<ref name=A000045>{{cite OEIS|A000045|Fibonacci numbers}}</ref> * '''1,160,290,625''' = 65⁵ * '''1,162,261,467''' = 3¹⁹ * '''1,162,268,326''' : Leyland number using 3 and 19 (3¹⁹ + 19³) * '''1,163,962,800''' : smallest superabundant number that is not highly composite<ref>{{cite OEIS|A166735|Superabundant numbers that are not highly composite}}</ref> * '''1,166,732,814''' : number of signed trees with 17 nodes<ref name="Number of signed trees">{{cite OEIS|A000060|Number of signed trees with n nodes}}</ref> * '''1,173,741,824''' : Leyland number using 8 and 10 (8¹⁰ + 10⁸) * '''1,220,703,125''' = 5¹³ * '''1,221,074,418''' : Leyland number using 5 and 13 (5¹³ + 13⁵) * '''1,252,332,576''' = 66⁵ * '''1,280,000,000''' = 20⁷ * '''1,291,467,969''' = 35937² = 1089³ = 33⁶ * '''1,311,738,121''' : 25th Pell number.<ref name=A000129>{{cite OEIS|A000129|Pell numbers}}</ref> * '''1,350,125,107''' = 67⁵ * '''1,382,958,545''' : 15th Bell number.<ref>{{cite OEIS|A000110|Bell or exponential numbers}}</ref> * '''1,392,251,012''' : number of secondary structures of RNA molecules with 27 nucleotides<ref name=A004148>{{cite OEIS|A004148|Generalized Catalan numbers}}</ref> * '''1,405,695,061''' : Markov prime.<ref name="A178444">{{cite OEIS|A178444|Markov numbers that are prime}}</ref> * '''1,406,818,759''' : 30th Wedderburn–Etherington number.<ref name=A001190>{{cite OEIS|A001190|Wedderburn-Etherington numbers}}</ref> * '''1,421,542,641''' : logarithmic number.<ref>{{cite OEIS|A002104|Logarithmic numbers}}</ref> * '''1,453,933,568''' = 68⁵ * '''1,464,407,113''' : number of series-reduced trees with 39 nodes<ref>{{cite OEIS|A000014|Number of series-reduced trees with n nodes}}</ref> * '''1,475,789,056''' = 38416² = 196⁴ = 14⁸ * '''1,528,823,808''' = 1152³ * '''1,533,776,805''' : both pentagonal and triangular.<ref name="A014979">{{Cite OEIS|A014979|Numbers that are both triangular and pentagonal}}</ref> * '''1,544,804,416''' = 39304² = 1156³ = 34⁶ * '''1,564,031,349''' = 69⁵ * '''1,606,879,040''' : Dowling number<ref>{{cite OEIS|A007405|2=Dowling numbers: e.g.f.: exp(x + (exp(b*x) - 1)/b) with b=2}}</ref> * '''1,626,557,542''' : Is "QWERTY" in base 36. * '''1,631,432,881''' = 40391², square triangular number * '''1,673,196,525''' : Least common multiple of the odd integers from 1 to 25<ref name="A003418">{{cite OEIS|A003418|Least common multiple of the first n natural numbers}}</ref> * '''1,677,922,740''' : number of series-reduced planted trees with 36 nodes<ref name=A001678>{{cite OEIS|A001678|Number of series-reduced planted trees with n nodes}}</ref> * '''1,680,700,000''' = 70⁵ * '''1,755,206,648''' : coefficient of a ménage hit polynomial<ref>{{cite OEIS|A000033|Coefficients of ménage hit polynomials}}</ref> * '''1,767,263,190''' : The 19th Catalan number.<ref name=A000108>{{cite OEIS|A000108|Catalan numbers: (2n)!/(n!(n+1)!)}}</ref> * '''1,787,109,376''' : 1-automorphic number<ref name = automorphic>{{Cite OEIS|A003226|Automorphic numbers}}</ref> * '''1,801,088,541''' = 21⁷ * '''1,804,229,351''' = 71⁵ * '''1,808,141,741''' : number of partitions of 280 into divisors of 280<ref name=A018818>{{cite OEIS|A018818|Number of partitions of n into divisors of n}}</ref> * '''1,808,676,326''' : number of 38-bead necklaces (turning over is allowed) where complements are equivalent<ref name=A000011>{{cite OEIS|A000011|Number of n-bead necklaces (turning over is allowed) where complements are equivalent}}</ref> * '''1,836,311,903''' : 46th Fibonacci number.<ref name=A000045 /> * '''1,838,265,625''' = 42875² = 1225³ = 35⁶ * '''1,848,549,332''' : number of partitions of 270 into divisors of 270<ref name=A018818/> * '''1,857,283,156''' : number of 37-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed<ref name=A000013>{{cite OEIS|A000013|Definition (1): Number of n-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed}}</ref> * '''1,882,341,361''' : The smallest prime whose reversal is a square triangular number (triangular of 57121).{{citation needed|date=December 2025}} * '''1,921,525,212''' : number of partitions of 264 into divisors of 264<ref name=A018818/> * '''1,934,502,740''' : number of parallelogram polyominoes with 27 cells.<ref name=A006958>{{cite OEIS|A006958|Number of parallelogram polyominoes with n cells (also called staircase polyominoes, although that term is overused)}}</ref> * '''1,934,917,632''' = 72⁵ * '''1,977,326,743''' = 7¹¹ * '''1,979,339,339''' : largest right-truncatable prime in decimal, if 1 is considered to be a prime<ref>{{cite OEIS|A012883|Numbers in which every prefix (in base 10) is 1 or a prime.}}</ref> * '''1,996,813,914''' : Leyland number using 7 and 11 (7¹¹ + 11⁷)

===2,000,000,000 to 2,999,999,999=== * '''2,023,443,032''' : number of trees with 28 unlabeled nodes<ref name=A000055>{{cite OEIS|A000055|Number of trees with n unlabeled nodes}}</ref> * '''2,038,074,743''' : 100,000,000th prime number{{citation needed|date=December 2025}} * '''2,062,142,876''' : number of centered hydrocarbons with 30 carbon atoms<ref name=A000022>{{cite OEIS|A000022|Number of centered hydrocarbons with n atoms}}</ref> * '''2,073,071,593''' = 73⁵ * '''2,147,483,647''' : 8th Mersenne prime,<ref>{{cite OEIS|A000668|Mersenne primes}}</ref> 3rd double Mersenne prime,<ref>{{cite OEIS|A263686|Smallest prime factor of double Mersenne numbers}}</ref> and the largest signed 32-bit integer.<ref>{{cite web|url=https://dev.mysql.com/doc/refman/8.4/en/integer-types.html|title=13.1.2 Integer Types (Exact Value) - INTEGER, INT, SMALLINT, TINYINT, MEDIUMINT, BIGINT|publisher=dev.mysql.com|access-date=January 9, 2026}}</ref> * '''2,147,483,648''' = 2³¹ * '''2,147,484,609''' : Leyland number using 2 and 31 (2³¹ + 31²) * '''2,176,782,336''' = 46656² = 1296³ = 216⁴ = 36⁶ = 6¹² * '''2,179,768,320''' : Leyland number using 6 and 12 (6¹² + 12⁶) * '''2,214,502,422''' : 6th primary pseudoperfect number.<ref>{{cite OEIS|A054377|Primary pseudoperfect numbers}}</ref> * '''2,219,006,624''' = 74⁵ * '''2,222,222,222''' : repdigit * '''2,276,423,485''' : number of ways to partition {1,2,...,12} and then partition each cell (block) into subcells.<ref>{{cite OEIS|A000258|Expansion of e.g.f. exp(exp(exp(x)-1)-1)}}</ref> * '''2,357,947,691''' = 1331³ = 11⁹ * '''2,373,046,875''' = 75⁵ * '''2,494,357,888''' = 22⁷ * '''2,521,008,887''' : 4th Mills' prime * '''2,535,525,376''' = 76⁵ * '''2,562,890,625''' = 50625² = 225⁴ = 15⁸ * '''2,565,726,409''' = 50653² = 1369³ = 37⁶ * '''2,573,571,875''' = 5⁵×7⁷ * '''2,695,730,992''' : number of (unordered, unlabeled) rooted trimmed trees with 29 nodes<ref name=A002955/> * '''2,706,784,157''' = 77⁵ * '''2,870,671,950''' : number of free 20-ominoes<ref>{{cite OEIS|A000105|Number of free polyominoes with n cells}}</ref> * '''2,873,403,980''' : number of uniform rooted trees with 27 nodes<ref name=A317712/> * '''2,834,510,744''' : number of nonequivalent dissections of a 22-gon into 19 polygons by non-intersecting diagonals up to rotation<ref>{{cite OEIS|A220881|Number of nonequivalent dissections of an n-gon into n-3 polygons by nonintersecting diagonals up to rotation}}</ref> * '''2,887,174,368''' = 78⁵ * '''2,971,215,073''' : 11th Fibonacci prime (47th Fibonacci number<ref name=A000045 />) and a Markov prime.<ref name="A178444" />

===3,000,000,000 to 3,999,999,999=== * '''3,010,936,384''' = 54872² = 1444³ = 38⁶ * '''3,077,056,399''' = 79⁵ * '''3,166,815,962''' : 26th Pell number.<ref name=A000129/> * '''3,192,727,797''' : 24th Motzkin number.<ref name=A001006/> * '''3,276,800,000''' = 80⁵ * '''3,323,236,238''' : 31st Wedderburn–Etherington number.<ref name=A001190/> * '''3,333,333,333''' : repdigit * '''3,404,825,447''' = 23⁷ * '''3,405,691,582''' = CAFEBABE₁₆; used as a magic debug value in programming. * '''3,405,697,037''' = CAFED00D₁₆; used as a magic debug value in programming. * '''3,461,824,644''' : number of secondary structures of RNA molecules with 28 nucleotides<ref name=A004148/> * '''3,486,784,401''' = 59049² = 243⁴ = 81⁵ = 9¹⁰ = 3²⁰ * '''3,486,792,401''' : Leyland number using 3 and 20 (3²⁰ + 20³) * '''3,492,564,909''' = 1²+3⁴+5⁶+7⁸+9¹⁰ * '''3,518,743,761''' = 59319² = 1521³ = 39⁶ * '''3,520,581,954''' : number of series-reduced planted trees with 37 nodes<ref name=A001678/> * '''3,524,337,980''' : number of 39-bead necklaces (turning over is allowed) where complements are equivalent<ref name=A000011/> * '''3,616,828,364''' : number of 38-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed<ref name=A000013/> * '''3,663,002,302''' : number of prime numbers having eleven digits<ref>{{Cite OEIS|A006879|Number of primes with n digits.}}</ref> * '''3,697,909,056''' : number of primitive polynomials of degree 37 over GF(2)<ref name=A011260>{{cite OEIS|A011260|Number of primitive polynomials of degree n over GF(2)}}</ref> * '''3,707,398,432''' = 82⁵ * '''3,715,891,200''' : double factorial of 20<ref>{{Cite OEIS|A006882|Double factorials}}</ref> * '''3,735,928,559''' = DEADBEEF₁₆; used as a magic debug value in programming. * '''3,735,929,054''' = DEADC0DE₁₆; used as a magic debug value in programming. * '''3,939,040,643''' = 83⁵

===4,000,000,000 to 4,999,999,999=== * '''4,096,000,000''' = 64000² = 1600³ = 40⁶ * '''4,118,054,813''' : number of primes under 10¹¹<ref>{{cite OEIS|A006880|Number of primes smaller than powers of ten)}}</ref> * '''4,182,119,424''' = 84⁵ * '''4,294,967,291''' : Largest prime 32-bit unsigned integer.<ref>{{cite OEIS|A014234|Number of primes smaller than powers of two)}}</ref> * '''4,294,967,295''' : Maximum 32-bit unsigned integer (FFFFFFFF₁₆), perfect totient number, product of all known Fermat primes <math>F_0</math> through <math>F_4</math>. * '''4,294,967,296''' = 65536² = 256⁴ = 16⁸ = 4¹⁶ = 2³² * '''4,294,967,297''' : <math>F_5</math>, the first composite Fermat number. * '''4,294,968,320''' : Leyland number using 2 and 32 (2³² + 32²) * '''4,295,032,832''' : Leyland number using 4 and 16 (4¹⁶ + 16⁴) * '''4,437,053,125''' = 85⁵ * '''4,444,444,444''' : repdigit * '''4,467,033,943''' : number of parallelogram polyominoes with 28 cells.<ref name=A006958/> * '''4,486,784,401''' : Leyland number using 9 and 10 (9¹⁰ + 10⁹) * '''4,586,471,424''' = 24⁷ * '''4,704,270,176''' = 86⁵ * '''4,750,104,241''' = 68921² = 1681³ = 41⁶ * '''4,807,526,976''' : 48th Fibonacci number.<ref name=A000045 /> * '''4,822,382,628''' : number of primitive polynomials of degree 38 over GF(2)<ref name=A011260/> * '''4,984,209,207''' : 87⁵

===5,000,000,000 to 5,999,999,999=== * '''5,159,780,352''' = 1728³ = 12⁹ = 1,000,000,000₁₂, or a great-great-great-gross (1,000,000₁₂ great-grosses or 1000₁₂ great-great-grosses) * '''5,277,319,168''' = 88⁵ * '''5,345,531,935''' : number of centered hydrocarbons with 31 carbon atoms<ref name=A000022/> * '''5,354,228,880''' : Least common multiple of the integers from 1 to 24<ref name="A003418" /> * '''5,391,411,025''' : smallest odd abundant number not divisible by 3<ref>{{cite OEIS|A115414|Odd abundant numbers not divisible by 3.}}</ref> * '''5,469,566,585''' : number of trees with 29 unlabeled nodes<ref name=A000055/> * '''5,489,031,744''' = 74088² = 1764³ = 42⁶ * '''5,555,555,555''' : repdigit * '''5,584,059,449''' = 89⁵ * '''5,702,046,382''' : number of signed trees with 18 nodes<ref name="Number of signed trees" /> * '''5,784,634,181''' : 13th alternating factorial.<ref>{{cite OEIS|A005165|Alternating factorials}}</ref> * '''5,904,900,000''' = 90⁵

===6,000,000,000 to 6,999,999,999=== * '''6,103,515,625''' = 78125² = 25⁷ = 5¹⁴ * '''6,104,053,449''' : Leyland number using 5 and 14 (5¹⁴ + 14⁵) * '''6,210,001,000''' : only self-descriptive number in base 10. * '''6,227,020,800''' = 13! * '''6,240,321,451''' = 91⁵ * '''6,321,363,049''' = 79507² = 1849³ = 43⁶ * '''6,469,693,230''' : tenth primorial * '''6,564,120,420''' : The 20th Catalan number.<ref name=A000108/> * '''6,590,815,232''' = 92⁵ * '''6,659,914,175''' : number of unordered unlabeled rooted trimmed trees with 30 nodes<ref name=A002955/> * '''6,666,666,666''' : repdigit * '''6,872,485,104''' : number of 40-bead necklaces (turning over is allowed) where complements are equivalent<ref name=A000011/> * '''6,956,883,693''' = 93⁵ * '''6,975,757,441''' = 83521² = 289⁴ = 17⁸ * '''6,983,776,800''' : 15th colossally abundant number,<ref>{{cite OEIS|A004490|Colossally abundant numbers}}</ref> 15th superior highly composite number,<ref>{{cite OEIS|A002201|Superior highly composite numbers}}</ref> and the largest number to be both.{{citation needed|date=December 2025}}

===7,000,000,000 to 7,999,999,999=== * '''7,048,151,672''' : number of 39-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed<ref name=A000013/> * '''7,256,313,856''' = 85184² = 1936³ = 44⁶ * '''7,339,040,224''' = 94⁵ * '''7,371,308,068''' : number of partitions of 252 into divisors of 252<ref name=A018818/> * '''7,391,026,522''' : number of planar partitions of 49<ref>{{cite OEIS|A000219|Number of planar partitions (or plane partitions) of n}}</ref> * '''7,395,528,814''' : number of series-reduced planted trees with 38 nodes<ref name=A001678/> * '''7,544,428,973''' : number of uniform rooted trees with 28 nodes<ref name=A317712/> * '''7,645,370,045''' : 27th Pell number.<ref name=A000129/> * '''7,737,809,375''' = 95⁵ * '''7,777,777,777''' : repdigit * '''7,778,742,049''' : 49th Fibonacci number.<ref name=A000045 /> * '''7,862,958,391''' : 32nd Wedderburn–Etherington number.<ref name=A001190/>

===8,000,000,000 to 8,999,999,999=== * '''8,031,810,176''' = 26⁷ * '''8,153,726,976''' = 96⁵ * '''8,212,890,625''' : 1-automorphic number<ref name = automorphic/> * '''8,303,765,625''' = 91125² = 2025³ = 45⁶ * '''8,549,176,320''' : pandigital number with the digits arranged in alphabetical order by English name * '''8,587,340,257''' = 97⁵ * '''8,589,866,963''' : number of subsets of {1,2,...,33} with relatively prime elements<ref>{{cite OEIS|A085945|Number of subsets of {1,2,...,n} with relatively prime elements}}</ref> * '''8,589,869,056''' : 6th perfect number.<ref>{{cite OEIS|A000396|Perfect numbers}}</ref> * '''8,589,934,592''' = 2048³ = 8¹¹ = 2³³ * '''8,589,935,681''' : Leyland prime<ref>{{Cite OEIS|A094133|Leyland prime numbers}}</ref> using 2 and 33 (2³³ + 33²) * '''8,622,571,758''' : number of secondary structures of RNA molecules with 29 nucleotides<ref name=A004148/> * '''8,804,293,473''' : Leyland number using 8 and 11 (8¹¹ + 11⁸) * '''8,888,888,888''' : repdigit

===9,000,000,000 to 9,999,999,999=== * '''9,039,207,968''' = 98⁵ * '''9,043,402,501''' : 25th Motzkin number.<ref name=A001006/> * '''9,393,931,000''' = 2110³ * '''9,474,296,896''' = 97336² = 2116³ = 46⁶ * '''9,509,900,499''' = 99⁵ * '''9,814,072,356''' = 99066², the largest pandigital square,{{citation needed|date=December 2025}} largest pandigital pure power.{{citation needed|date=December 2025}} * '''9,876,543,210''' : largest pandigital number. * '''9,999,800,001''' = 99999², the largest ten-digit square. * '''9,999,999,967''' : greatest prime number with 10 digits<ref name="wAlfa">{{cite web |url=http://www.wolframalpha.com/input/?i=Greatest+prime+number+with+10+digits |title=Greatest prime number with 10 digits |website=Wolfram Alpha |access-date=13 November 2017}}</ref> * '''9,999,999,999''' : largest 10-digit number, repdigit

==References== {{Reflist}}

{{Large numbers}} {{Integers|10}} {{Portal bar|Mathematics}}

{{DEFAULTSORT:1000000000 (Number)}} Category:Integers Category:Large numbers Category:Powers of ten