81378648848

Names of 81378648848

• Cardinal: 81378648848 can be written as Eighty-one billion, three hundred seventy-eight million, six hundred forty-eight thousand, eight hundred forty-eight.

Scientific notation

• Scientific notation: 8.1378648848 × 10¹⁰

Factors of 81378648848

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 379

Divisors of 81378648848

• Number of divisors d(n): 150
• Complete list of divisors:
  1 2 4 7 8 14 16 17 28 34 49 56 68 98 112 119 136 196 238 272 343 353 392 476 686 706 784 833 952 1372 1412 1666 1904 2401 2471 2744 2824 3332 4802 4942 5488 5648 5831 6001 6664 9604 9884 11662 12002 13328 17297 19208 19768 23324 24004 34594 38416 39536 40817 42007 46648 48008 69188 81634 84014 93296 96016 121079 124609 138376 163268 168028 242158 249218 276752 294049 326536 336056 484316 498436 588098 653072 672112 847553 872263 968632 996872 1176196 1695106 1744526 1937264 1993744 2058343 2118353 2352392 3390212 3489052 4116686 4236706 4704784 6105841 6780424 6978104 8233372 8473412 12211682 13560848 13956208 14408401 14828471 16466744 16946824 24423364 28816802 29656942 32933488 33893648 42740887 48846728 57633604 59313884 85481774 97693456 103799297 115267208 118627768 170963548 207598594 230534416 237255536 299186209 341927096 415197188 598372418 683854192 726595079 830394376 1196744836 1453190158 1660788752 2393489672 2906380316 4786979344 5086165553 5812760632 10172331106 11625521264 20344662212 40689324424 81378648848
• Sum of all divisors σ(n): 195311920554
• Sum of proper divisors (its aliquot sum) s(n): 113933271706
• 81378648848 is an abundant number, because the sum of its proper divisors (113933271706) is greater than itself. Its abundance is 32554622858

Bases of 81378648848

• Binary: 1001011110010100010111010001100010000₂
• Hexadecimal: 0x12F28BA310
• Base-36: 11DUQVBK

Squares and roots of 81378648848

• 81378648848 squared (81378648848²) is 6622484488326091727104
• 81378648848 cubed (81378648848³) is 538928839676815973976234259976192
• The square root of 81378648848 is 285269.4320252347
• The cube root of 81378648848 is 4333.4802835741

Scales and comparisons

• 81,378,648,848 seconds is equal to 2,587 years, 30 weeks, 4 days, 12 hours, 14 minutes, 8 seconds.
• To count from 1 to 81,378,648,848 would take you about five thousand, one hundred seventy-five 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 81378648848 cubic inches would be around 361.1 feet tall.

Recreational maths with 81378648848

• 81378648848 backwards is 84884687318
• The number of decimal digits it has is: 11
• The sum of 81378648848's digits is 65
• More coming soon!