81399867840
81,399,867,840 is an even composite number composed of six prime numbers multiplied together.
81399867840 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of six hundred seventy-two divisors.
Prime factorization of 81399867840:
26 × 35 × 5 × 17 × 139 × 443
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 5 × 17 × 139 × 443)See below for interesting mathematical facts about the number 81399867840 from the Numbermatics database.
Names of 81399867840
- Cardinal: 81399867840 can be written as Eighty-one billion, three hundred ninety-nine million, eight hundred sixty-seven thousand, eight hundred forty.
Scientific notation
- Scientific notation: 8.139986784 × 1010
Factors of 81399867840
Divisors of 81399867840
- Number of divisors d(n): 672
-
Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 27 30 32 34 36 40 45 48 51 54 60 64 68 72 80 81 85 90 96 102 108 120 135 136 139 144 153 160 162 170 180 192 204 216 240 243 255 270 272 278 288 306 320 324 340 360 405 408 417 432 443 459 480 486 510 540 544 556 576 612 648 680 695 720 765 810 816 834 864 886 918 960 972 1020 1080 1088 1112 1215 1224 1251 1296 1329 1360 1377 1390 1440 1530 1620 1632 1668 1728 1772 1836 1944 2040 2085 2160 2215 2224 2295 2363 2430 2448 2502 2592 2658 2720 2754 2780 2880 3060 3240 3264 3336 3544 3672 3753 3888 3987 4080 4131 4170 4320 4430 4448 4590 4726 4860 4896 5004 5184 5316 5440 5508 5560 6120 6255 6480 6645 6672 6885 7088 7089 7344 7506 7531 7776 7974 8160 8262 8340 8640 8860 8896 9180 9452 9720 9792 10008 10632 11016 11120 11259 11815 11961 12240 12510 12960 13290 13344 13770 14176 14178 14688 15012 15062 15552 15948 16320 16524 16680 17720 18360 18765 18904 19440 19935 20016 20655 21264 21267 22032 22240 22518 22593 23630 23922 24480 25020 25920 26580 26688 27540 28352 28356 29376 30024 30124 31896 33048 33360 33777 35440 35445 35883 36720 37530 37655 37808 38880 39870 40032 41310 42528 42534 44064 44480 45036 45186 47260 47844 48960 50040 53160 55080 56295 56712 59805 60048 60248 61577 63792 63801 66096 66720 67554 67779 70880 70890 71766 73440 75060 75310 75616 77760 79740 80064 82620 85056 85068 88128 90072 90372 94520 95688 100080 106320 106335 107649 110160 112590 112965 113424 119610 120096 120496 123154 127584 127602 132192 133440 135108 135558 141760 141780 143532 146880 150120 150620 151232 159480 165240 168885 170136 179415 180144 180744 184731 189040 191376 191403 200160 203337 212640 212670 215298 220320 225180 225930 226848 239220 240192 240992 246308 255168 255204 264384 270216 271116 283560 287064 300240 301240 307885 318960 319005 330480 337770 338895 340272 358830 360288 361488 369462 378080 382752 382806 400320 406674 425280 425340 430596 440640 450360 451860 453696 478440 481984 492616 510408 538245 540432 542232 554193 567120 574128 574209 600480 602480 610011 615770 637920 638010 660960 675540 677790 680544 717660 720576 722976 738924 756160 765504 765612 813348 850680 861192 900720 903720 923655 956880 957015 985232 1016685 1020816 1046809 1076490 1080864 1084464 1108386 1134240 1148256 1148418 1200960 1204960 1220022 1231540 1275840 1276020 1321920 1351080 1355580 1361088 1435320 1445952 1477848 1531224 1626696 1662579 1701360 1722384 1801440 1807440 1830033 1847310 1913760 1914030 1970464 2033370 2041632 2093618 2152980 2161728 2168928 2216772 2268480 2296512 2296836 2409920 2440044 2463080 2552040 2702160 2711160 2770965 2870640 2871045 2955696 3050055 3062448 3140427 3253392 3325158 3402720 3444768 3602880 3614880 3660066 3694620 3827520 3828060 3940928 4066740 4083264 4187236 4305960 4337856 4433544 4593672 4880088 4926160 4987737 5104080 5234045 5404320 5422320 5541930 5741280 5742090 5911392 6100110 6124896 6280854 6506784 6650316 6805440 6889536 7229760 7320132 7389240 7656120 8133480 8312895 8374472 8611920 8867088 9150165 9187344 9421281 9760176 9852320 9975474 10208160 10468090 10808640 10844640 11083860 11482560 11484180 11822784 12200220 12249792 12561708 13013568 13300632 14640264 14778480 14963211 15312240 15702135 16266960 16625790 16748944 17223840 17734176 18300330 18374688 18842562 19520352 19704640 19950948 20416320 20936180 21689280 22167720 22968360 24400440 24938685 25123416 26601264 28263843 29280528 29556960 29926422 30624480 31404270 32533920 33251580 33497888 34447680 35468352 36600660 36749376 37685124 39040704 39901896 41872360 44335440 45936720 47106405 48800880 49877370 50246832 53202528 56527686 58561056 59113920 59852844 61248960 62808540 65067840 66503160 66995776 73201320 74816055 75370248 79803792 83744720 84791529 88670880 91873440 94212810 97601760 99754740 100493664 106405056 113055372 117122112 119705688 125617080 133006320 141319215 146402640 149632110 150740496 159607584 167489440 169583058 177341760 183746880 188425620 195203520 199509480 200987328 226110744 239411376 251234160 254374587 266012640 282638430 292805280 299264220 301480992 319215168 334978880 339166116 376851240 399018960 423957645 452221488 478822752 502468320 508749174 532025280 565276860 585610560 598528440 602961984 678332232 753702480 798037920 847915290 904442976 957645504 1004936640 1017498348 1130553720 1197056880 1271872935 1356664464 1507404960 1596075840 1695830580 1808885952 2034996696 2261107440 2394113760 2543745870 2713328928 3014809920 3391661160 4069993392 4522214880 4788227520 5087491740 5426657856 6783322320 8139986784 9044429760 10174983480 13566644640 16279973568 20349966960 27133289280 40699933920 81399867840
- Sum of all divisors σ(n): 310341507840
- Sum of proper divisors (its aliquot sum) s(n): 228941640000
- 81399867840 is an abundant number, because the sum of its proper divisors (228941640000) is greater than itself. Its abundance is 147541772160
Bases of 81399867840
- Binary: 10010111100111100111101101001110000002
- Hexadecimal: 0x12F3CF69C0
- Base-36: 11E7DO00
Squares and roots of 81399867840
- 81399867840 squared (813998678402) is 6625938484369466265600
- 81399867840 cubed (813998678403) is 539350516943644459751178338304000
-
The
square root of 81399867840 is 285306.6207433679 -
The
cube root of 81399867840 is 4333.8568937947
Scales and comparisons
How big is 81399867840?- 81,399,867,840 seconds is equal to 2,588 years, 13 weeks, 5 days, 2 hours, 24 minutes.
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To count from 1 to 81,399,867,840 would take you about five thousand, one hundred seventy-six 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 81399867840 cubic inches would be around 361.2 feet tall.
Recreational maths with 81399867840
- 81399867840 backwards is 04876899318
- The number of decimal digits it has is: 11
- The sum of 81399867840's digits is 63
- More coming soon!
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The information we have on file for 81399867840 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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