81799791990

Names of 81799791990

• Cardinal: 81799791990 can be written as Eighty-one billion, seven hundred ninety-nine million, seven hundred ninety-one thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 8.179979199 × 10¹⁰

Factors of 81799791990

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 172332

Divisors of 81799791990

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 17 19 21 30 34 35 38 42 49 51 57 70 85 95 98 102 105 114 119 133 147 170 190 210 238 245 255 266 285 294 323 357 399 490 510 570 595 646 665 714 735 798 833 931 969 1190 1330 1470 1615 1666 1785 1862 1938 1995 2261 2499 2793 3230 3570 3990 4165 4522 4655 4845 4998 5586 6783 8330 9310 9690 11305 12495 13566 13965 15827 22610 24990 27930 31654 33915 47481 67830 79135 94962 158270 172279 237405 344558 474810 516837 861395 1033674 1205953 1722790 2411906 2584185 2928743 3273301 3617859 5168370 5857486 6029765 6546602 7235718 8441671 8786229 9819903 12059530 14643715 16366505 16883342 17572458 18089295 19639806 20501201 22913107 25325013 29287430 32733010 36178590 41002402 42208355 43931145 45826214 49099515 50650026 55646117 61503603 68739321 84416710 87862290 98199030 102506005 111292234 114565535 123007206 126625065 137478642 143508407 160391749 166938351 205012010 229131070 253250130 278230585 287016814 307518015 320783498 333876702 343696605 389522819 430525221 481175247 556461170 615036030 687393210 717542035 779045638 801958745 834691755 861050442 962350494 1168568457 1435084070 1603917490 1669383510 1947614095 2152626105 2337136914 2405876235 2726659733 3895228190 4305252210 4811752470 5453319466 5842842285 8179979199 11685684570 13633298665 16359958398 27266597330 40899895995 81799791990
• Sum of all divisors σ(n): 254533363200
• Sum of proper divisors (its aliquot sum) s(n): 172733571210
• 81799791990 is an abundant number, because the sum of its proper divisors (172733571210) is greater than itself. Its abundance is 90933779220

Bases of 81799791990

• Binary: 1001100001011101001011100010101110110₂
• Hexadecimal: 0x130BA5C576
• Base-36: 11KTHFG6

Squares and roots of 81799791990

• 81799791990 squared (81799791990²) is 6691205969607268160100
• 81799791990 cubed (81799791990³) is 547339256476120797488330017599000
• The square root of 81799791990 is 286006.6292763159
• The cube root of 81799791990 is 4340.9428319293

Scales and comparisons

• 81,799,791,990 seconds is equal to 2,600 years, 50 weeks, 6 days, 20 hours, 26 minutes, 30 seconds.
• To count from 1 to 81,799,791,990 would take you about five thousand, two hundred one 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 81799791990 cubic inches would be around 361.7 feet tall.

Recreational maths with 81799791990

• 81799791990 backwards is 09919799718
• The number of decimal digits it has is: 11
• The sum of 81799791990's digits is 69
• More coming soon!