81364840128

Names of 81364840128

• Cardinal: 81364840128 can be written as Eighty-one billion, three hundred sixty-four million, eight hundred forty thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1364840128 × 10¹⁰

Factors of 81364840128

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 987850

Divisors of 81364840128

• Number of divisors d(n): 168
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 32 33 36 39 44 48 52 64 66 72 78 88 96 99 104 117 132 143 144 156 176 192 198 208 234 264 286 288 312 352 396 416 429 468 528 572 576 624 704 792 832 858 936 1056 1144 1248 1287 1584 1716 1872 2112 2288 2496 2574 3168 3432 3744 4576 5148 6336 6864 7488 9152 10296 13728 20592 27456 41184 82368 987821 1975642 2963463 3951284 5926926 7902568 8890389 10866031 11853852 12841673 15805136 17780778 21732062 23707704 25683346 31610272 32598093 35561556 38525019 43464124 47415408 51366692 63220544 65196186 71123112 77050038 86928248 94830816 97794279 102733384 115575057 130392372 141258403 142246224 154100076 173856496 189661632 195588558 205466768 231150114 260784744 282516806 284492448 308200152 347712992 391177116 410933536 423775209 462300228 521569488 565033612 568984896 616400304 695425984 782354232 821867072 847550418 924600456 1043138976 1130067224 1232800608 1271325627 1564708464 1695100836 1849200912 2086277952 2260134448 2465601216 2542651254 3129416928 3390201672 3698401824 4520268896 5085302508 6258833856 6780403344 7396803648 9040537792 10170605016 13560806688 20341210032 27121613376 40682420064 81364840128
• Sum of all divisors σ(n): 273990212496
• Sum of proper divisors (its aliquot sum) s(n): 192625372368
• 81364840128 is an abundant number, because the sum of its proper divisors (192625372368) is greater than itself. Its abundance is 111260532240

Bases of 81364840128

• Binary: 1001011110001101110001110111011000000₂
• Hexadecimal: 0x12F1B8EEC0
• Base-36: 11DMIWG0

Squares and roots of 81364840128

• 81364840128 squared (81364840128²) is 6620237209054999056384
• 81364840128 cubed (81364840128³) is 538654542124196912181875017777152
• The square root of 81364840128 is 285245.2280547389
• The cube root of 81364840128 is 4333.2351611263

Scales and comparisons

• 81,364,840,128 seconds is equal to 2,587 years, 7 weeks, 5 days, 16 hours, 28 minutes, 48 seconds.
• To count from 1 to 81,364,840,128 would take you about five thousand, one hundred seventy-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 81364840128 cubic inches would be around 361.1 feet tall.

Recreational maths with 81364840128

• 81364840128 backwards is 82104846318
• The number of decimal digits it has is: 11
• The sum of 81364840128's digits is 45
• More coming soon!