81518379008

Names of 81518379008

• Cardinal: 81518379008 can be written as Eighty-one billion, five hundred eighteen million, three hundred seventy-nine thousand and eight.

Scientific notation

• Scientific notation: 8.1518379008 × 10¹⁰

Factors of 81518379008

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 280

Divisors of 81518379008

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 4 8 11 16 22 32 43 44 64 67 86 88 128 134 157 172 176 256 268 314 344 352 473 512 536 628 688 704 737 946 1024 1072 1256 1376 1408 1474 1727 1892 2048 2144 2512 2752 2816 2881 2948 3454 3784 4096 4288 5024 5504 5632 5762 5896 6751 6908 7568 8192 8576 10048 10519 11008 11264 11524 11792 13502 13816 15136 16384 17152 20096 21038 22016 22528 23048 23584 27004 27632 30272 31691 34304 40192 42076 44032 45056 46096 47168 54008 55264 60544 63382 68608 74261 80384 84152 88064 90112 92192 94336 108016 110528 115709 121088 126764 137216 148522 160768 168304 176128 180224 184384 188672 216032 221056 231418 242176 253528 274432 297044 321536 336608 352256 368768 377344 432064 442112 452317 462836 484352 507056 548864 594088 643072 673216 704512 737536 754688 864128 884224 904634 925672 968704 1014112 1097728 1188176 1286144 1346432 1475072 1509376 1728256 1768448 1809268 1851344 1937408 2028224 2376352 2572288 2692864 2950144 3018752 3456512 3536896 3618536 3702688 3874816 4056448 4752704 4975487 5385728 5900288 6037504 6913024 7073792 7237072 7405376 7749632 8112896 9505408 9950974 10771456 11800576 12075008 13826048 14147584 14474144 14810752 16225792 19010816 19901948 21542912 23601152 27652096 28295168 28948288 29621504 32451584 38021632 39803896 43085824 47202304 55304192 57896576 59243008 64903168 76043264 79607792 86171648 110608384 115793152 118486016 129806336 152086528 159215584 172343296 231586304 236972032 259612672 304173056 318431168 463172608 473944064 519225344 608346112 636862336 926345216 947888128 1216692224 1273724672 1852690432 1895776256 2547449344 3705380864 5094898688 7410761728 10189797376 20379594752 40759189504 81518379008
• Sum of all divisors σ(n): 185881686144
• Sum of proper divisors (its aliquot sum) s(n): 104363307136
• 81518379008 is an abundant number, because the sum of its proper divisors (104363307136) is greater than itself. Its abundance is 22844928128

Bases of 81518379008

• Binary: 1001011111010110111111100000000000000₂
• Hexadecimal: 0x12FADFC000
• Base-36: 11G5XRSW

Squares and roots of 81518379008

• 81518379008 squared (81518379008²) is 6645246116091935064064
• 81518379008 cubed (81518379008³) is 541709691493022330324493912768512
• The square root of 81518379008 is 285514.2360863991
• The cube root of 81518379008 is 4335.9591141871

Scales and comparisons

• 81,518,379,008 seconds is equal to 2,592 years, 1 week, 4 days, 18 hours, 10 minutes, 8 seconds.
• To count from 1 to 81,518,379,008 would take you about five thousand, one hundred eighty-four 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 81518379008 cubic inches would be around 361.3 feet tall.

Recreational maths with 81518379008

• 81518379008 backwards is 80097381518
• The number of decimal digits it has is: 11
• The sum of 81518379008's digits is 50
• More coming soon!