81521513073
81,521,513,073 is an odd composite number composed of six prime numbers multiplied together.
81521513073 is an odd composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred sixty divisors.
Prime factorization of 81521513073:
34 × 7 × 112 × 132 × 79 × 89
(3 × 3 × 3 × 3 × 7 × 11 × 11 × 13 × 13 × 79 × 89)See below for interesting mathematical facts about the number 81521513073 from the Numbermatics database.
Names of 81521513073
- Cardinal: 81521513073 can be written as Eighty-one billion, five hundred twenty-one million, five hundred thirteen thousand and seventy-three.
Scientific notation
- Scientific notation: 8.1521513073 × 1010
Factors of 81521513073
Divisors of 81521513073
- Number of divisors d(n): 360
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Complete list of divisors:
1 3 7 9 11 13 21 27 33 39 63 77 79 81 89 91 99 117 121 143 169 189 231 237 267 273 297 351 363 429 507 553 567 623 693 711 801 819 847 869 891 979 1001 1027 1053 1089 1157 1183 1287 1521 1573 1659 1859 1869 2079 2133 2403 2457 2541 2607 2937 3003 3081 3267 3471 3549 3861 4563 4719 4977 5577 5607 6083 6237 6399 6853 7031 7189 7209 7371 7623 7821 8099 8811 9009 9243 9559 9801 10413 10647 10769 11011 11297 11583 12727 13013 13351 13689 14157 14931 15041 16731 16821 18249 20449 20559 21093 21567 22869 23463 24297 26433 27027 27729 28677 31239 31941 32307 33033 33891 38181 39039 40053 42471 44793 45123 49217 50193 50463 54747 61347 61677 63279 64701 66913 68607 70389 72891 75383 77341 79079 79299 81081 83187 86031 89089 91403 93457 93717 95823 96921 99099 101673 105287 114543 117117 120159 124267 127413 135369 139997 143143 146861 147651 150579 164241 165451 184041 185031 189837 194103 200739 218673 226149 232023 237237 258093 267267 274209 280371 290763 297297 305019 315861 343629 351351 360477 372801 406107 419991 429429 440583 442953 492723 496353 541387 552123 555093 569511 582309 602217 639821 656019 678447 696069 711711 774279 801801 822627 841113 850751 869869 872289 891891 915057 947583 979979 1005433 1028027 1030887 1054053 1081431 1118403 1158157 1188239 1218321 1259973 1288287 1321749 1328859 1489059 1615471 1624161 1656369 1806651 1819961 1919463 2035341 2088207 2135133 2405403 2467881 2523339 2552253 2609607 2842749 2939937 3016299 3084081 3355209 3474471 3564717 3779919 3864861 3965247 3986577 4467177 4846413 4872483 5419953 5459883 5758389 5955257 6106023 6264621 6405399 7038031 7216209 7403643 7570017 7656759 7828821 8317673 8528247 8819811 9048897 9252243 10065627 10423413 10694151 11059763 11308297 11339757 11594583 11895741 12739727 13070629 13401531 14539239 14617449 16379649 17275167 17865771 21114093 22970277 23486463 24953019 26459433 27146691 27756729 31270239 32082453 33179289 33924891 38219181 39211887 43617717 43852347 49138947 51825501 53597313 63342279 68910831 70459389 74859057 77418341 79378299 81440073 83270187 91494403 93810717 96247359 99537867 101774673 114657543 117635661 130853151 143776919 147416841 160791939 190026837 224577171 232255023 274483209 298613601 305324019 343972629 352906983 431330757 482375817 570080511 673731513 696765069 823449627 895840803 915972057 1006438433 1031917887 1058720949 1293992271 2090295207 2470348881 3019315299 3881976813 6270885621 7411046643 9057945897 11645930439 27173837691 81521513073
- Sum of all divisors σ(n): 169633094400
- Sum of proper divisors (its aliquot sum) s(n): 88111581327
- 81521513073 is an abundant number, because the sum of its proper divisors (88111581327) is greater than itself. Its abundance is 6590068254
Bases of 81521513073
- Binary: 10010111110110000111110010010011100012
- Hexadecimal: 0x12FB0F9271
- Base-36: 11G7SY29
Squares and roots of 81521513073
- 81521513073 squared (815215130732) is 6645757093711309903329
- 81521513073 cubed (815215130733) is 541772173794969036372189439720017
-
The
square root of 81521513073 is 285519.7244902705 -
The
cube root of 81521513073 is 4336.0146804031
Scales and comparisons
How big is 81521513073?- 81,521,513,073 seconds is equal to 2,592 years, 6 weeks, 6 days, 44 minutes, 33 seconds.
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To count from 1 to 81,521,513,073 would take you about five thousand, one hundred eighty-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 81521513073 cubic inches would be around 361.3 feet tall.
Recreational maths with 81521513073
- 81521513073 backwards is 37031512518
- The number of decimal digits it has is: 11
- The sum of 81521513073's digits is 36
- More coming soon!
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