81120165420
81,120,165,420 is an even composite number composed of seven prime numbers multiplied together.
81120165420 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 81120165420:
22 × 3 × 5 × 73 × 41 × 127 × 757
(2 × 2 × 3 × 5 × 7 × 7 × 7 × 41 × 127 × 757)See below for interesting mathematical facts about the number 81120165420 from the Numbermatics database.
Names of 81120165420
- Cardinal: 81120165420 can be written as Eighty-one billion, one hundred twenty million, one hundred sixty-five thousand, four hundred twenty.
Scientific notation
- Scientific notation: 8.112016542 × 1010
Factors of 81120165420
Divisors of 81120165420
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 41 42 49 60 70 82 84 98 105 123 127 140 147 164 196 205 210 245 246 254 287 294 343 381 410 420 490 492 508 574 588 615 635 686 735 757 762 820 861 889 980 1029 1148 1230 1270 1372 1435 1470 1514 1524 1715 1722 1778 1905 2009 2058 2271 2460 2540 2667 2870 2940 3028 3430 3444 3556 3785 3810 4018 4116 4305 4445 4542 5145 5207 5299 5334 5740 6027 6223 6860 7570 7620 8036 8610 8890 9084 10045 10290 10414 10598 10668 11355 12054 12446 13335 14063 15140 15621 15897 17220 17780 18669 20090 20580 20828 21196 22710 24108 24892 26035 26495 26670 28126 30135 31037 31115 31242 31794 36449 37093 37338 40180 42189 43561 45420 52070 52990 53340 56252 60270 62074 62230 62484 63588 70315 72898 74186 74676 78105 79485 84378 87122 93111 93345 96139 104140 105980 109347 111279 120540 124148 124460 130683 140630 145796 148372 155185 156210 158970 168756 174244 182245 185465 186222 186690 192278 210945 217259 217805 218694 222558 255143 259651 261366 281260 288417 310370 312420 317940 364490 370930 372444 373380 384556 421890 434518 435610 437388 445116 465555 480695 510286 519302 522732 546735 556395 576834 620740 651777 653415 672973 728980 741860 765429 778953 843780 869036 871220 931110 961390 1020572 1038604 1086295 1093470 1112790 1153668 1275715 1298255 1303554 1306830 1345946 1442085 1520813 1530858 1557906 1786001 1862220 1922780 2018919 2172590 2186940 2225580 2551430 2596510 2607108 2613660 2691892 2884170 3041626 3061716 3115812 3258885 3364865 3572002 3827145 3894765 3941699 4037838 4345180 4562439 4710811 5102860 5193020 5358003 5768340 6083252 6517770 6729730 7144004 7604065 7654290 7789530 7883398 8075676 8930005 9124878 9421622 10094595 10645691 10716006 11825097 13035540 13459460 14132433 15208130 15308580 15579060 15766796 17860010 18249756 18843244 19708495 20189190 21291382 21432012 22812195 23554055 23650194 26790015 27591893 28264866 30416260 31937073 32975677 35720020 39416990 40378380 42582764 45624390 47108110 47300388 53228455 53580030 55183786 56529732 59125485 63874146 65951354 70662165 78833980 82775679 91248780 94216220 98927031 106456910 107160060 110367572 118250970 127748292 131902708 137959465 141324330 159685365 164878385 165551358 193143251 197854062 212913820 236501940 275918930 282648660 319370730 329756770 331102716 386286502 395708124 413878395 494635155 551837860 579429753 638741460 659513540 772573004 827756790 965716255 989270310 1158859506 1352002757 1655513580 1931432510 1978540620 2317719012 2704005514 2897148765 3862865020 4056008271 5408011028 5794297530 6760013785 8112016542 11588595060 13520027570 16224033084 20280041355 27040055140 40560082710 81120165420
- Sum of all divisors σ(n): 273840537600
- Sum of proper divisors (its aliquot sum) s(n): 192720372180
- 81120165420 is an abundant number, because the sum of its proper divisors (192720372180) is greater than itself. Its abundance is 111600206760
Bases of 81120165420
- Binary: 10010111000110010001101111110001011002
- Hexadecimal: 0x12E3237E2C
- Base-36: 119KUO8C
Squares and roots of 81120165420
- 81120165420 squared (811201654202) is 6580481237768163776400
- 81120165420 cubed (811201654203) is 533809726550959797151219892088000
-
The
square root of 81120165420 is 284816.0203008251 -
The
cube root of 81120165420 is 4328.8872651629
Scales and comparisons
How big is 81120165420?- 81,120,165,420 seconds is equal to 2,579 years, 19 weeks, 1 day, 19 hours, 17 minutes.
-
To count from 1 to 81,120,165,420 would take you about five thousand, one hundred fifty-eight 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 81120165420 cubic inches would be around 360.7 feet tall.
Recreational maths with 81120165420
- 81120165420 backwards is 02456102118
- 81120165420 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81120165420's digits is 30
- More coming soon!
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