81989086912

Names of 81989086912

• Cardinal: 81989086912 can be written as Eighty-one billion, nine hundred eighty-nine million, eighty-six thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 8.1989086912 × 10¹⁰

Factors of 81989086912

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 5768

Divisors of 81989086912

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 4 8 16 32 53 61 64 71 106 122 142 212 244 284 424 488 568 848 976 1136 1696 1952 2272 3233 3392 3763 3904 4331 4544 5581 6466 7526 8662 11162 12932 15052 17324 22324 25864 30104 34648 44648 51728 60208 69296 89296 103456 120416 138592 178592 206912 229543 240832 277184 295793 340441 357184 396251 459086 591586 680882 792502 918172 1183172 1361764 1585004 1836344 2366344 2723528 3170008 3672688 4732688 5447056 6340016 7345376 9465376 10894112 12680032 14690752 18043373 18930752 21001303 21788224 24171311 25360064 36086746 42002606 48342622 72173492 84005212 96685244 144346984 168010424 193370488 288693968 336020848 386740976 577387936 672041696 773481952 1154775872 1281079483 1344083392 1546963904 2562158966 5124317932 10248635864 20497271728 40994543456 81989086912
• Sum of all divisors σ(n): 170887973184
• Sum of proper divisors (its aliquot sum) s(n): 88898886272
• 81989086912 is an abundant number, because the sum of its proper divisors (88898886272) is greater than itself. Its abundance is 6909799360

Bases of 81989086912

• Binary: 1001100010110111011100010111011000000₂
• Hexadecimal: 0x1316EE2EC0
• Base-36: 11NY6OCG

Squares and roots of 81989086912

• 81989086912 squared (81989086912²) is 6722210372663489695744
• 81989086912 cubed (81989086912³) is 551147890485054765593571252502528
• The square root of 81989086912 is 286337.3655532927
• The cube root of 81989086912 is 4344.2887466945

Scales and comparisons

• 81,989,086,912 seconds is equal to 2,606 years, 51 weeks, 6 days, 18 hours, 21 minutes, 52 seconds.
• To count from 1 to 81,989,086,912 would take you about five thousand, two hundred thirteen 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 81989086912 cubic inches would be around 362 feet tall.

Recreational maths with 81989086912

• 81989086912 backwards is 21968098918
• 81989086912 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81989086912's digits is 61
• More coming soon!