81361638540
81,361,638,540 is an even composite number composed of seven prime numbers multiplied together.
81361638540 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 81361638540:
22 × 33 × 5 × 7 × 13 × 457 × 3623
(2 × 2 × 3 × 3 × 3 × 5 × 7 × 13 × 457 × 3623)See below for interesting mathematical facts about the number 81361638540 from the Numbermatics database.
Names of 81361638540
- Cardinal: 81361638540 can be written as Eighty-one billion, three hundred sixty-one million, six hundred thirty-eight thousand, five hundred forty.
Scientific notation
- Scientific notation: 8.136163854 × 1010
Factors of 81361638540
Divisors of 81361638540
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 3 4 5 6 7 9 10 12 13 14 15 18 20 21 26 27 28 30 35 36 39 42 45 52 54 60 63 65 70 78 84 90 91 105 108 117 126 130 135 140 156 180 182 189 195 210 234 252 260 270 273 315 351 364 378 390 420 455 457 468 540 546 585 630 702 756 780 819 910 914 945 1092 1170 1260 1365 1371 1404 1638 1755 1820 1828 1890 2285 2340 2457 2730 2742 3199 3276 3510 3623 3780 4095 4113 4570 4914 5460 5484 5941 6398 6855 7020 7246 8190 8226 9140 9597 9828 10869 11882 12285 12339 12796 13710 14492 15995 16380 16452 17823 18115 19194 20565 21738 23764 24570 24678 25361 27420 28791 29705 31990 32607 35646 36230 38388 41130 41587 43476 47099 47985 49140 49356 50722 53469 54345 57582 59410 61695 63980 65214 71292 72460 76083 82260 83174 86373 89115 94198 95970 97821 101444 106938 108690 115164 118820 123390 124761 126805 130428 141297 143955 152166 160407 163035 166348 172746 178230 188396 191940 195642 207935 213876 217380 228249 235495 246780 249522 253610 267345 282594 287910 304332 320814 326070 329693 345492 356460 374283 380415 391284 415870 423891 431865 456498 470990 489105 499044 507220 534690 565188 575820 623805 641628 652140 659386 684747 706485 748566 760830 802035 831740 847782 863730 912996 941980 978210 989079 1069380 1122849 1141245 1247610 1271673 1318772 1369494 1412970 1497132 1521660 1604070 1648465 1655711 1695564 1727460 1871415 1956420 1978158 2119455 2245698 2282490 2495220 2543346 2738988 2825940 2967237 3208140 3296930 3311422 3423735 3742830 3956316 4238910 4491396 4564980 4945395 4967133 5086692 5614245 5934474 6358365 6593860 6622844 6847470 7485660 8278555 8477820 8901711 9890790 9934266 11228490 11589977 11868948 12716730 13694940 14836185 14901399 16557110 17803422 19781580 19868532 21524243 22456980 23179954 24835665 25433460 29672370 29802798 33114220 34769931 35606844 43048486 44508555 44704197 46359908 49671330 57949885 59344740 59605596 64572729 69539862 74506995 86096972 89017110 89408394 99342660 104309793 107621215 115899770 129145458 139079724 149013990 150669701 173849655 178034220 178816788 193718187 208619586 215242430 223520985 231799540 258290916 298027980 301339402 312929379 322863645 347699310 387436374 417239172 430484860 447041970 452009103 521548965 581154561 602678804 625858758 645727290 695398620 753348505 774872748 894083940 904018206 968590935 1043097930 1162309122 1251717516 1291454580 1356027309 1506697010 1564646895 1808036412 1937181870 2086195860 2260045515 2324618244 2712054618 2905772805 3013394020 3129293790 3874363740 4068081927 4520091030 5424109236 5811545610 6258587580 6780136545 8136163854 9040182060 11623091220 13560273090 16272327708 20340409635 27120546180 40680819270 81361638540
- Sum of all divisors σ(n): 312306462720
- Sum of proper divisors (its aliquot sum) s(n): 230944824180
- 81361638540 is an abundant number, because the sum of its proper divisors (230944824180) is greater than itself. Its abundance is 149583185640
Bases of 81361638540
- Binary: 10010111100011000100000010100100011002
- Hexadecimal: 0x12F188148C
- Base-36: 11DKMA30
Squares and roots of 81361638540
- 81361638540 squared (813616385402) is 6619716225913613331600
- 81361638540 cubed (813616385403) is 538590958810156389150964359864000
-
The
square root of 81361638540 is 285239.6160073141 -
The
cube root of 81361638540 is 4333.1783248825
Scales and comparisons
How big is 81361638540?- 81,361,638,540 seconds is equal to 2,587 years, 2 weeks, 3 days, 15 hours, 9 minutes.
-
To count from 1 to 81,361,638,540 would take you about five thousand, one hundred seventy-four 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 81361638540 cubic inches would be around 361.1 feet tall.
Recreational maths with 81361638540
- 81361638540 backwards is 04583616318
- 81361638540 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81361638540's digits is 45
- More coming soon!
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The information we have on file for 81361638540 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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