81444727168

Names of 81444727168

• Cardinal: 81444727168 can be written as Eighty-one billion, four hundred forty-four million, seven hundred twenty-seven thousand, one hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1444727168 × 10¹⁰

Factors of 81444727168

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 34240

Divisors of 81444727168

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 7 8 14 16 17 28 32 34 56 64 68 112 119 128 136 157 224 238 272 314 448 476 544 628 896 952 1088 1099 1256 1904 2176 2198 2512 2669 3808 4396 5024 5338 7616 8792 10048 10676 15232 17584 18683 20096 21352 34057 35168 37366 42704 68114 70336 74732 85408 136228 140672 149464 170816 238399 272456 298928 341632 476798 544912 578969 597856 953596 1089824 1157938 1195712 1907192 2179648 2315876 2391424 3814384 4052783 4359296 4631752 5346949 7628768 8105566 9263504 10693898 15257536 16211132 18527008 21387796 30515072 32422264 37054016 37428643 42775592 64844528 74108032 74857286 85551184 90898133 129689056 149714572 171102368 181796266 259378112 299429144 342204736 363592532 518756224 598858288 636286931 684409472 727185064 1197716576 1272573862 1454370128 2395433152 2545147724 2908740256 4790866304 5090295448 5817480512 10180590896 11634961024 20361181792 40722363584 81444727168
• Sum of all divisors σ(n): 197596342080
• Sum of proper divisors (its aliquot sum) s(n): 116151614912
• 81444727168 is an abundant number, because the sum of its proper divisors (116151614912) is greater than itself. Its abundance is 34706887744

Bases of 81444727168

• Binary: 1001011110110011110111110100110000000₂
• Hexadecimal: 0x12F67BE980
• Base-36: 11EY35OG

Squares and roots of 81444727168

• 81444727168 squared (81444727168²) is 6633243583469957300224
• 81444727168 cubed (81444727168³) is 540242713894597307041353545285632
• The square root of 81444727168 is 285385.2259105225
• The cube root of 81444727168 is 4334.6528746329

Scales and comparisons

• 81,444,727,168 seconds is equal to 2,589 years, 35 weeks, 6 days, 7 hours, 19 minutes, 28 seconds.
• To count from 1 to 81,444,727,168 would take you about five thousand, one hundred seventy-nine 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 81444727168 cubic inches would be around 361.2 feet tall.

Recreational maths with 81444727168

• 81444727168 backwards is 86172744418
• The number of decimal digits it has is: 11
• The sum of 81444727168's digits is 52
• More coming soon!