81396565120
81,396,565,120 is an even composite number composed of five prime numbers multiplied together.
81396565120 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 81396565120:
27 × 5 × 134 × 61 × 73
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 13 × 13 × 13 × 13 × 61 × 73)See below for interesting mathematical facts about the number 81396565120 from the Numbermatics database.
Names of 81396565120
- Cardinal: 81396565120 can be written as Eighty-one billion, three hundred ninety-six million, five hundred sixty-five thousand, one hundred twenty.
Scientific notation
- Scientific notation: 8.139656512 × 1010
Factors of 81396565120
Divisors of 81396565120
- Number of divisors d(n): 320
-
Complete list of divisors:
1 2 4 5 8 10 13 16 20 26 32 40 52 61 64 65 73 80 104 122 128 130 146 160 169 208 244 260 292 305 320 338 365 416 488 520 584 610 640 676 730 793 832 845 949 976 1040 1168 1220 1352 1460 1586 1664 1690 1898 1952 2080 2197 2336 2440 2704 2920 3172 3380 3796 3904 3965 4160 4394 4453 4672 4745 4880 5408 5840 6344 6760 7592 7808 7930 8320 8788 8906 9344 9490 9760 10309 10816 10985 11680 12337 12688 13520 15184 15860 17576 17812 18980 19520 20618 21632 21970 22265 23360 24674 25376 27040 28561 30368 31720 35152 35624 37960 39040 41236 43940 44530 46720 49348 50752 51545 54080 57122 57889 60736 61685 63440 70304 71248 75920 82472 87880 89060 98696 101504 103090 108160 114244 115778 121472 123370 126880 134017 140608 142496 142805 151840 160381 164944 175760 178120 197392 206180 228488 231556 246740 253760 268034 281216 284992 285610 289445 303680 320762 329888 351520 356240 394784 412360 456976 463112 493480 507520 536068 569984 571220 578890 607360 641524 659776 670085 703040 712480 752557 789568 801905 824720 913952 926224 986960 1072136 1142440 1157780 1283048 1319552 1340170 1406080 1424960 1505114 1579136 1603810 1649440 1742221 1827904 1852448 1973920 2084953 2144272 2284880 2315560 2566096 2680340 2849920 3010228 3207620 3298880 3484442 3655808 3704896 3762785 3947840 4169906 4288544 4569760 4631120 5132192 5360680 6020456 6415240 6597760 6968884 7409792 7525570 7895680 8339812 8577088 8711105 9139520 9262240 9783241 10264384 10424765 10721360 12040912 12830480 13937768 15051140 16679624 17154176 17422210 18279040 18524480 19566482 20528768 20849530 21442720 24081824 25660960 27875536 30102280 33359248 34844420 37048960 39132964 41699060 42885440 48163648 48916205 51321920 55751072 60204560 66718496 69688840 78265928 83398120 85770880 96327296 97832410 102643840 111502144 120409120 127182133 133436992 139377680 156531856 166796240 195664820 223004288 240818240 254364266 266873984 278755360 313063712 333592480 391329640 481636480 508728532 557510720 626127424 635910665 667184960 782659280 1017457064 1115021440 1252254848 1271821330 1334369920 1565318560 2034914128 2543642660 3130637120 4069828256 5087285320 6261274240 8139656512 10174570640 16279313024 20349141280 40698282560 81396565120
- Sum of all divisors σ(n): 217194681240
- Sum of proper divisors (its aliquot sum) s(n): 135798116120
- 81396565120 is an abundant number, because the sum of its proper divisors (135798116120) is greater than itself. Its abundance is 54401551000
Bases of 81396565120
- Binary: 10010111100111001110100000100100000002
- Hexadecimal: 0x12F39D0480
- Base-36: 11E5EVLS
Squares and roots of 81396565120
- 81396565120 squared (813965651202) is 6625400813334400614400
- 81396565120 cubed (813965651203) is 539284868748674503946177609728000
-
The
square root of 81396565120 is 285300.8326661525 -
The
cube root of 81396565120 is 4333.7982790005
Scales and comparisons
How big is 81396565120?- 81,396,565,120 seconds is equal to 2,588 years, 8 weeks, 1 day, 20 hours, 58 minutes, 40 seconds.
-
To count from 1 to 81,396,565,120 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 81396565120 cubic inches would be around 361.1 feet tall.
Recreational maths with 81396565120
- 81396565120 backwards is 02156569318
- The number of decimal digits it has is: 11
- The sum of 81396565120's digits is 46
- More coming soon!
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