81440674640
81,440,674,640 is an even composite number composed of seven prime numbers multiplied together.
81440674640 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 81440674640:
24 × 5 × 13 × 17 × 73 × 89 × 709
(2 × 2 × 2 × 2 × 5 × 13 × 17 × 73 × 89 × 709)See below for interesting mathematical facts about the number 81440674640 from the Numbermatics database.
Names of 81440674640
- Cardinal: 81440674640 can be written as Eighty-one billion, four hundred forty million, six hundred seventy-four thousand, six hundred forty.
Scientific notation
- Scientific notation: 8.144067464 × 1010
Factors of 81440674640
Divisors of 81440674640
- Number of divisors d(n): 320
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Complete list of divisors:
1 2 4 5 8 10 13 16 17 20 26 34 40 52 65 68 73 80 85 89 104 130 136 146 170 178 208 221 260 272 292 340 356 365 442 445 520 584 680 709 712 730 884 890 949 1040 1105 1157 1168 1241 1360 1418 1424 1460 1513 1768 1780 1898 2210 2314 2482 2836 2920 3026 3536 3545 3560 3796 4420 4628 4745 4964 5672 5785 5840 6052 6205 6497 7090 7120 7565 7592 8840 9217 9256 9490 9928 11344 11570 12053 12104 12410 12994 14180 15130 15184 16133 17680 18434 18512 18980 19669 19856 23140 24106 24208 24820 25988 28360 30260 32266 32485 36868 37960 39338 46085 46280 48212 49640 51757 51976 56720 60265 60520 63101 64532 64970 73736 75920 78676 80665 84461 92170 92560 96424 98345 99280 103514 103952 110449 120530 121040 126202 129064 129940 147472 156689 157352 161330 168922 184340 192848 196690 207028 220898 241060 252404 258128 258785 259880 313378 314704 315505 322660 337844 368680 393380 414056 422305 441796 482120 504808 517570 519760 552245 626756 631010 645320 672841 675688 737360 783445 786760 820313 828112 844610 879869 883592 964240 1009616 1035140 1072717 1104490 1253512 1262020 1290640 1345682 1351376 1435837 1566890 1573520 1640626 1689220 1759738 1767184 2070280 2145434 2208980 2507024 2524040 2691364 2871674 3133780 3281252 3364205 3378440 3519476 4101565 4140560 4290868 4399345 4417960 4606373 5048080 5363585 5382728 5743348 6267560 6562504 6728410 6756880 7038952 7179185 8203130 8581736 8798690 8835920 9212746 10727170 10765456 11438297 11486696 12535120 13125008 13456820 13945321 14077904 14358370 16406260 17163472 17597380 18425492 21454340 22876594 22973392 23031865 26913640 27890642 28716740 32812520 35194760 36850984 42908680 45753188 46063730 53827280 55781284 57191485 57433480 59882849 65625040 69726605 70389520 73701968 78308341 85817360 91506376 92127460 111562568 114382970 114866960 119765698 139453210 156616682 183012752 184254920 223125136 228765940 239531396 278906420 299414245 313233364 368509840 391541705 457531880 479062792 557812840 598828490 626466728 783083410 915063760 958125584 1018008433 1115625680 1197656980 1252933456 1566166820 2036016866 2395313960 3132333640 4072033732 4790627920 5090042165 6264667280 8144067464 10180084330 16288134928 20360168660 40720337320 81440674640
- Sum of all divisors σ(n): 221638939200
- Sum of proper divisors (its aliquot sum) s(n): 140198264560
- 81440674640 is an abundant number, because the sum of its proper divisors (140198264560) is greater than itself. Its abundance is 58757589920
Bases of 81440674640
- Binary: 10010111101100011111000010011010100002
- Hexadecimal: 0x12F63E1350
- Base-36: 11EVOAQ8
Squares and roots of 81440674640
- 81440674640 squared (814406746402) is 6632583485818339129600
- 81440674640 cubed (814406746403) is 540162073691168411198934393344000
-
The
square root of 81440674640 is 285378.1257209459 -
The
cube root of 81440674640 is 4334.5809788653
Scales and comparisons
How big is 81440674640?- 81,440,674,640 seconds is equal to 2,589 years, 29 weeks, 1 day, 9 hours, 37 minutes, 20 seconds.
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To count from 1 to 81,440,674,640 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 81440674640 cubic inches would be around 361.2 feet tall.
Recreational maths with 81440674640
- 81440674640 backwards is 04647604418
- The number of decimal digits it has is: 11
- The sum of 81440674640's digits is 44
- More coming soon!
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