81072938240

Names of 81072938240

• Cardinal: 81072938240 can be written as Eighty-one billion, seventy-two million, nine hundred thirty-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 8.107293824 × 10¹⁰

Factors of 81072938240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 96

Divisors of 81072938240

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 29 32 35 40 49 53 56 58 64 70 80 98 106 112 116 128 140 145 160 196 203 212 224 232 245 256 265 280 290 320 371 392 406 424 448 464 490 530 560 580 640 742 784 812 841 848 896 928 980 1015 1060 1120 1160 1280 1421 1484 1537 1568 1624 1682 1696 1792 1855 1856 1960 2030 2120 2240 2320 2597 2842 2968 3074 3136 3248 3364 3392 3710 3712 3920 4060 4205 4240 4480 4640 5194 5684 5887 5936 6148 6272 6496 6728 6784 7105 7420 7424 7685 7840 8120 8410 8480 8960 9280 10388 10759 11368 11774 11872 12296 12544 12985 12992 13456 13568 14210 14840 15370 15680 16240 16820 16960 18560 20776 21518 22736 23548 23744 24389 24592 25970 25984 26912 28420 29435 29680 30740 31360 32480 33640 33920 37120 41209 41552 43036 44573 45472 47096 47488 48778 49184 51940 51968 53795 53824 56840 58870 59360 61480 62720 64960 67280 67840 75313 82418 83104 86072 89146 90944 94192 94976 97556 98368 103880 107590 107648 113680 117740 118720 121945 122960 129920 134560 150626 164836 166208 170723 172144 178292 181888 188384 195112 196736 206045 207760 215180 215296 222865 227360 235480 237440 243890 245920 259840 269120 301252 312011 329672 332416 341446 344288 356584 363776 376565 376768 390224 393472 412090 415520 430360 445730 454720 470960 474880 487780 491840 538240 602504 624022 659344 664832 682892 688576 713168 753130 753536 780448 824180 831040 853615 860720 891460 909440 941920 975560 983680 1076480 1195061 1205008 1248044 1292617 1318688 1365784 1377152 1426336 1506260 1507072 1560055 1560896 1648360 1662080 1707230 1721440 1782920 1818880 1883840 1951120 1967360 2184077 2390122 2410016 2496088 2585234 2637376 2731568 2754304 2852672 3012520 3120110 3121792 3296720 3324160 3414460 3442880 3565840 3767680 3902240 4368154 4780244 4820032 4992176 5170468 5274752 5463136 5705344 5975305 6025040 6240220 6243584 6463085 6593440 6828920 6885760 7131680 7535360 7804480 8736308 9048319 9560488 9640064 9984352 10340936 10549504 10920385 10926272 11410688 11950610 12050080 12480440 12926170 13186880 13657840 13771520 14263360 15608960 17472616 18096638 19120976 19280128 19968704 20681872 21840770 21852544 23901220 24100160 24960880 25852340 26373760 27315680 28526720 31217920 34945232 36193276 38241952 39937408 41363744 43681540 43705088 45241595 47802440 48200320 49921760 51704680 52747520 54631360 57053440 63338233 69890464 72386552 76483904 79874816 82727488 87363080 90483190 95604880 96400640 99843520 103409360 109262720 126676466 139780928 144773104 152967808 165454976 174726160 180966380 191209760 199687040 206818720 218525440 253352932 279561856 289546208 305935616 316691165 330909952 349452320 361932760 382419520 399374080 413637440 506705864 559123712 579092416 633382330 698904640 723865520 764839040 827274880 1013411728 1158184832 1266764660 1397809280 1447731040 1529678080 1654549760 2026823456 2316369664 2533529320 2795618560 2895462080 4053646912 5067058640 5790924160 8107293824 10134117280 11581848320 16214587648 20268234560 40536469120 81072938240
• Sum of all divisors σ(n): 238382358480
• Sum of proper divisors (its aliquot sum) s(n): 157309420240
• 81072938240 is an abundant number, because the sum of its proper divisors (157309420240) is greater than itself. Its abundance is 76236482000

Bases of 81072938240

• Binary: 1001011100000010100101101110100000000₂
• Hexadecimal: 0x12E052DD00
• Base-36: 118SQFI8

Squares and roots of 81072938240

• 81072938240 squared (81072938240²) is 6572821314866854297600
• 81072938240 cubed (81072938240³) is 532877936522756072292403380224000
• The square root of 81072938240 is 284733.1000077089
• The cube root of 81072938240 is 4328.0470267987

Scales and comparisons

• 81,072,938,240 seconds is equal to 2,577 years, 45 weeks, 1 day, 4 hours, 37 minutes, 20 seconds.
• To count from 1 to 81,072,938,240 would take you about five thousand, one hundred fifty-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 81072938240 cubic inches would be around 360.7 feet tall.

Recreational maths with 81072938240

• 81072938240 backwards is 04283927018
• The number of decimal digits it has is: 11
• The sum of 81072938240's digits is 44
• More coming soon!