81437630912

Names of 81437630912

• Cardinal: 81437630912 can be written as Eighty-one billion, four hundred thirty-seven million, six hundred thirty thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 8.1437630912 × 10¹⁰

Factors of 81437630912

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 397

Divisors of 81437630912

• Number of divisors d(n): 168
• Complete list of divisors:
  1 2 4 8 11 16 22 31 32 44 62 64 88 121 124 176 242 248 341 352 353 484 496 682 704 706 961 968 992 1364 1412 1922 1936 1984 2728 2824 3751 3844 3872 3883 5456 5648 7502 7688 7744 7766 10571 10912 10943 11296 15004 15376 15532 21142 21824 21886 22592 29791 30008 30752 31064 42284 42713 43772 59582 60016 61504 62128 84568 85426 87544 116281 119164 120032 120373 124256 169136 170852 175088 232562 238328 240064 240746 248512 327701 338272 339233 341704 350176 465124 476656 481492 655402 676544 678466 683408 700352 930248 953312 962984 1310804 1324103 1356932 1366816 1860496 1906624 1925968 2621608 2648206 2713864 2733632 3604711 3720992 3731563 3851936 5243216 5296412 5427728 7209422 7441984 7463126 7703872 10486432 10516223 10592824 10855456 14418844 14926252 20972864 21032446 21185648 21710912 28837688 29852504 41047193 42064892 42371296 57675376 59705008 82094386 84129784 84742592 115350752 115678453 119410016 164188772 168259568 230701504 231356906 238820032 328377544 336519136 462713812 656755088 673038272 925427624 1272462983 1313510176 1850855248 2544925966 2627020352 3701710496 5089851932 7403420992 10179703864 20359407728 40718815456 81437630912
• Sum of all divisors σ(n): 184070280576
• Sum of proper divisors (its aliquot sum) s(n): 102632649664
• 81437630912 is an abundant number, because the sum of its proper divisors (102632649664) is greater than itself. Its abundance is 21195018752

Bases of 81437630912

• Binary: 1001011110110000011111010000111000000₂
• Hexadecimal: 0x12F60FA1C0
• Base-36: 11ETV268

Squares and roots of 81437630912

• 81437630912 squared (81437630912²) is 6632087728559137951744
• 81437630912 cubed (81437630912³) is 540101512614403518079019538710528
• The square root of 81437630912 is 285372.7928727615
• The cube root of 81437630912 is 4334.5269786175

Scales and comparisons

• 81,437,630,912 seconds is equal to 2,589 years, 24 weeks, 1 day, 4 hours, 8 minutes, 32 seconds.
• To count from 1 to 81,437,630,912 would take you about five thousand, one hundred seventy-eight years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81437630912 cubic inches would be around 361.2 feet tall.

Recreational maths with 81437630912

• 81437630912 backwards is 21903673418
• 81437630912 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81437630912's digits is 44
• More coming soon!