81729406136

Names of 81729406136

• Cardinal: 81729406136 can be written as Eighty-one billion, seven hundred twenty-nine million, four hundred six thousand, one hundred thirty-six.

Scientific notation

• Scientific notation: 8.1729406136 × 10¹⁰

Factors of 81729406136

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 4802

Divisors of 81729406136

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 7 8 14 28 29 31 49 56 58 62 98 116 124 196 203 217 232 248 343 392 406 434 686 812 868 899 1372 1421 1519 1624 1736 1798 2401 2744 2842 3038 3596 4733 4802 5684 6076 6293 7192 9466 9604 9947 10633 11368 12152 12586 18932 19208 19894 21266 25172 33131 37864 39788 42532 44051 50344 66262 69629 74431 79576 85064 88102 132524 137257 139258 146723 148862 176204 231917 265048 274514 278516 293446 297724 308357 352408 463834 549028 557032 586892 595448 616714 927668 960799 1027061 1098056 1173784 1233428 1623419 1855336 1921598 2054122 2158499 2466856 3246838 3843196 4108244 4254967 4316998 6493676 6725593 7189427 7686392 8216488 8509934 8633996 11363933 12987352 13451186 14378854 17019868 17267992 22727866 26902372 28757708 29784769 34039736 45455732 47079151 50325989 53804744 57515416 59569538 90911464 94158302 100651978 119139076 188316604 201303956 208493383 238278152 329554057 352281923 376633208 402607912 416986766 659108114 704563846 833973532 1318216228 1409127692 1459453681 1667947064 2636432456 2818255384 2918907362 5837814724 10216175767 11675629448 20432351534 40864703068 81729406136
• Sum of all divisors σ(n): 190943049600
• Sum of proper divisors (its aliquot sum) s(n): 109213643464
• 81729406136 is an abundant number, because the sum of its proper divisors (109213643464) is greater than itself. Its abundance is 27484237328

Bases of 81729406136

• Binary: 1001100000111011100111100010010111000₂
• Hexadecimal: 0x130773C4B8
• Base-36: 11JNKTDK

Squares and roots of 81729406136

• 81729406136 squared (81729406136²) is 6679695827343234450496
• 81729406136 cubed (81729406136³) is 545927573137879742276454370643456
• The square root of 81729406136 is 285883.5534548989
• The cube root of 81729406136 is 4339.6973982569

Scales and comparisons

• 81,729,406,136 seconds is equal to 2,598 years, 38 weeks, 4 days, 4 hours, 48 minutes, 56 seconds.
• To count from 1 to 81,729,406,136 would take you about five thousand, one hundred ninety-seven 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 81729406136 cubic inches would be around 361.6 feet tall.

Recreational maths with 81729406136

• 81729406136 backwards is 63160492718
• The number of decimal digits it has is: 11
• The sum of 81729406136's digits is 47
• More coming soon!