81315326820
81,315,326,820 is an even composite number composed of seven prime numbers multiplied together.
81315326820 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred eighty-eight divisors.
Prime factorization of 81315326820:
22 × 3 × 5 × 7 × 132 × 409 × 2801
(2 × 2 × 3 × 5 × 7 × 13 × 13 × 409 × 2801)See below for interesting mathematical facts about the number 81315326820 from the Numbermatics database.
Names of 81315326820
- Cardinal: 81315326820 can be written as Eighty-one billion, three hundred fifteen million, three hundred twenty-six thousand, eight hundred twenty.
Scientific notation
- Scientific notation: 8.131532682 × 1010
Factors of 81315326820
Divisors of 81315326820
- Number of divisors d(n): 288
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Complete list of divisors:
1 2 3 4 5 6 7 10 12 13 14 15 20 21 26 28 30 35 39 42 52 60 65 70 78 84 91 105 130 140 156 169 182 195 210 260 273 338 364 390 409 420 455 507 546 676 780 818 845 910 1014 1092 1183 1227 1365 1636 1690 1820 2028 2045 2366 2454 2535 2730 2801 2863 3380 3549 4090 4732 4908 5070 5317 5460 5602 5726 5915 6135 7098 8180 8403 8589 10140 10634 11204 11452 11830 12270 14005 14196 14315 15951 16806 17178 17745 19607 21268 23660 24540 26585 28010 28630 31902 33612 34356 35490 36413 37219 39214 42015 42945 53170 56020 57260 58821 63804 69121 70980 72826 74438 78428 79755 84030 85890 98035 106340 109239 111657 117642 138242 145652 148876 159510 168060 171780 182065 186095 196070 207363 218478 223314 235284 254891 276484 294105 319020 345605 364130 372190 392140 414726 436956 446628 473369 483847 509782 546195 558285 588210 691210 728260 744380 764673 829452 946738 967694 1019564 1036815 1092390 1116570 1145609 1176420 1274455 1382420 1420107 1451541 1529346 1893476 1935388 2073630 2184780 2233140 2291218 2366845 2419235 2548910 2840214 2903082 3058692 3313583 3436827 3823365 4147260 4582436 4733690 4838470 5097820 5680428 5728045 5806164 6627166 6873654 7100535 7257705 7646730 8019263 9467380 9676940 9940749 11456090 13254332 13747308 14201070 14515410 14892917 15293460 16038526 16567915 17184135 19881498 22912180 24057789 28402140 29030820 29785834 32077052 33135830 34368270 39762996 40096315 44678751 48115578 49703745 59571668 66271660 68736540 74464585 80192630 89357502 96231156 99407490 104250419 120288945 148929170 160385260 178715004 193607921 198814980 208500838 223393755 240577890 297858340 312751257 387215842 417001676 446787510 481155780 521252095 580823763 625502514 774431684 893575020 968039605 1042504190 1161647526 1251005028 1355255447 1563756285 1936079210 2085008380 2323295052 2710510894 2904118815 3127512570 3872158420 4065766341 5421021788 5808237630 6255025140 6776277235 8131532682 11616475260 13552554470 16263065364 20328831705 27105108940 40657663410 81315326820
- Sum of all divisors σ(n): 282554576640
- Sum of proper divisors (its aliquot sum) s(n): 201239249820
- 81315326820 is an abundant number, because the sum of its proper divisors (201239249820) is greater than itself. Its abundance is 119923923000
Bases of 81315326820
- Binary: 10010111011101100010101101011011001002
- Hexadecimal: 0x12EEC56B64
- Base-36: 11CT1NQC
Squares and roots of 81315326820
- 81315326820 squared (813153268202) is 6612182375843411312400
- 81315326820 cubed (813153268203) is 537671770885151064011491118568000
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The
square root of 81315326820 is 285158.4240733561 -
The
cube root of 81315326820 is 4332.3560084829
Scales and comparisons
How big is 81315326820?- 81,315,326,820 seconds is equal to 2,585 years, 29 weeks, 6 days, 14 hours, 47 minutes.
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To count from 1 to 81,315,326,820 would take you about five thousand, one hundred seventy-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 81315326820 cubic inches would be around 361 feet tall.
Recreational maths with 81315326820
- 81315326820 backwards is 02862351318
- 81315326820 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81315326820's digits is 39
- More coming soon!
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The information we have on file for 81315326820 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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