81379913440
81,379,913,440 is an even composite number composed of six prime numbers multiplied together.
81379913440 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of four hundred thirty-two divisors.
Prime factorization of 81379913440:
25 × 5 × 72 × 37 × 472 × 127
(2 × 2 × 2 × 2 × 2 × 5 × 7 × 7 × 37 × 47 × 47 × 127)See below for interesting mathematical facts about the number 81379913440 from the Numbermatics database.
Names of 81379913440
- Cardinal: 81379913440 can be written as Eighty-one billion, three hundred seventy-nine million, nine hundred thirteen thousand, four hundred forty.
Scientific notation
- Scientific notation: 8.137991344 × 1010
Factors of 81379913440
Divisors of 81379913440
- Number of divisors d(n): 432
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Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 32 35 37 40 47 49 56 70 74 80 94 98 112 127 140 148 160 185 188 196 224 235 245 254 259 280 296 329 370 376 392 470 490 508 518 560 592 635 658 740 752 784 889 940 980 1016 1036 1120 1184 1270 1295 1316 1480 1504 1568 1645 1739 1778 1813 1880 1960 2032 2072 2209 2303 2540 2590 2632 2960 3290 3478 3556 3626 3760 3920 4064 4144 4418 4445 4606 4699 5080 5180 5264 5920 5969 6223 6580 6956 7112 7252 7520 7840 8288 8695 8836 8890 9065 9212 9398 10160 10360 10528 11045 11515 11938 12173 12446 13160 13912 14224 14504 15463 17390 17672 17780 18130 18424 18796 20320 20720 22090 23030 23495 23876 24346 24892 26320 27824 28448 29008 29845 30926 31115 32893 34780 35344 35560 36260 36848 37592 41440 41783 44180 46060 46990 47752 48692 49784 52640 55648 58016 59690 60865 61852 62230 65786 69560 70688 71120 72520 73696 75184 77315 81733 83566 85211 88360 92120 93980 95504 97384 99568 108241 119380 121730 123704 124460 131572 139120 142240 145040 150368 154630 163466 164465 167132 170422 176720 184240 187960 191008 194768 199136 208915 216482 220853 230251 238760 243460 247408 248920 263144 278240 280543 290080 292481 309260 326932 328930 334264 340844 353440 368480 375920 389536 408665 417830 426055 432964 441706 460502 477520 486920 494816 497840 526288 541205 561086 572131 584962 618520 653864 657860 668528 681688 751840 817330 835660 852110 865928 883412 921004 955040 973840 995680 1052576 1082410 1104265 1122172 1144262 1151255 1169924 1237040 1307728 1315720 1337056 1363376 1402715 1462405 1545971 1634660 1671320 1704220 1731856 1766824 1842008 1947680 1963801 2164820 2208530 2244344 2288524 2302510 2339848 2474080 2615456 2631440 2726752 2805430 2860655 2924810 3091942 3269320 3342640 3408440 3463712 3533648 3684016 3927602 4004917 4329640 4417060 4488688 4577048 4605020 4679696 5262880 5610860 5721310 5849620 6183884 6538640 6685280 6816880 7067296 7368032 7729855 7855204 8009834 8659280 8834120 8977376 9154096 9210040 9359392 9819005 10380091 10821797 11221720 11442620 11699240 12367768 13077280 13633760 13746607 15459710 15710408 16019668 17318560 17668240 18308192 18420080 19638010 20024585 20760182 21643594 22443440 22885240 23398480 24735536 27493214 30919420 31420816 32039336 35336480 36840160 39276020 40049170 41520364 43287188 44886880 45770480 46796960 49471072 51900455 54108985 54986428 61838840 62841632 64078672 68733035 72660637 78552040 80098340 83040728 86574376 91540960 103800910 108217970 109972856 123677680 128157344 137466070 145321274 157104080 160196680 166081456 173148752 207601820 216435940 219945712 247355360 274932140 290642548 314208160 320393360 332162912 346297504 363303185 415203640 432871880 439891424 508624459 549864280 581285096 640786720 726606370 830407280 865743760 1017248918 1099728560 1162570192 1453212740 1660814560 1731487520 2034497836 2199457120 2325140384 2543122295 2906425480 4068995672 5086244590 5812850960 8137991344 10172489180 11625701920 16275982688 20344978360 40689956720 81379913440
- Sum of all divisors σ(n): 236533022208
- Sum of proper divisors (its aliquot sum) s(n): 155153108768
- 81379913440 is an abundant number, because the sum of its proper divisors (155153108768) is greater than itself. Its abundance is 73773195328
Bases of 81379913440
- Binary: 10010111100101001111011101110111000002
- Hexadecimal: 0x12F29EEEE0
- Base-36: 11DVHZ34
Squares and roots of 81379913440
- 81379913440 squared (813799134402) is 6622690311501892633600
- 81379913440 cubed (813799134403) is 538953964289950658918541635584000
-
The
square root of 81379913440 is 285271.6485036675 -
The
cube root of 81379913440 is 4333.5027303141
Scales and comparisons
How big is 81379913440?- 81,379,913,440 seconds is equal to 2,587 years, 32 weeks, 5 days, 3 hours, 30 minutes, 40 seconds.
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To count from 1 to 81,379,913,440 would take you about five thousand, one hundred seventy-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 81379913440 cubic inches would be around 361.1 feet tall.
Recreational maths with 81379913440
- 81379913440 backwards is 04431997318
- 81379913440 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81379913440's digits is 49
- More coming soon!
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