81355132144

Names of 81355132144

• Cardinal: 81355132144 can be written as Eighty-one billion, three hundred fifty-five million, one hundred thirty-two thousand, one hundred forty-four.

Scientific notation

• Scientific notation: 8.1355132144 × 10¹⁰

Factors of 81355132144

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4230

Divisors of 81355132144

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 8 11 13 16 22 26 44 52 88 104 121 143 176 208 242 286 484 572 968 1013 1144 1573 1936 2026 2288 3146 3191 4052 6292 6382 8104 11143 12584 12764 13169 16208 22286 25168 25528 26338 35101 41483 44572 51056 52676 70202 82966 89144 105352 122573 140404 144859 165932 178288 210704 245146 280808 289718 331864 386111 456313 490292 561616 579436 663728 772222 912626 980584 1158872 1544444 1593449 1825252 1961168 2317744 3088888 3186898 3232483 3650504 5019443 6177776 6373796 6464966 7301008 10038886 12747592 12929932 20077772 25495184 25859864 35557313 40155544 42022279 51719728 71114626 80311088 84044558 142229252 168089116 284458504 336178232 391130443 462245069 568917008 672356464 782260886 924490138 1564521772 1848980276 3129043544 3697960552 5084695759 6258087088 7395921104 10169391518 20338783036 40677566072 81355132144
• Sum of all divisors σ(n): 186828104736
• Sum of proper divisors (its aliquot sum) s(n): 105472972592
• 81355132144 is an abundant number, because the sum of its proper divisors (105472972592) is greater than itself. Its abundance is 24117840448

Bases of 81355132144

• Binary: 1001011110001001001001100110011110000₂
• Hexadecimal: 0x12F124CCF0
• Base-36: 11DGQTPS

Squares and roots of 81355132144

• 81355132144 squared (81355132144²) is 6618657526167702036736
• 81355132144 cubed (81355132144³) is 538461757657253537103475222441984
• The square root of 81355132144 is 285228.2106384289
• The cube root of 81355132144 is 4333.0628153861

Scales and comparisons

• 81,355,132,144 seconds is equal to 2,586 years, 43 weeks, 5 days, 7 hours, 49 minutes, 4 seconds.
• To count from 1 to 81,355,132,144 would take you about five thousand, one hundred seventy-three 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 81355132144 cubic inches would be around 361.1 feet tall.

Recreational maths with 81355132144

• 81355132144 backwards is 44123155318
• The number of decimal digits it has is: 11
• The sum of 81355132144's digits is 37
• More coming soon!