81138582090
81,138,582,090 is an even composite number composed of six prime numbers multiplied together.
81138582090 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two hundred twenty-four divisors.
Prime factorization of 81138582090:
2 × 36 × 5 × 17 × 61 × 10733
(2 × 3 × 3 × 3 × 3 × 3 × 3 × 5 × 17 × 61 × 10733)See below for interesting mathematical facts about the number 81138582090 from the Numbermatics database.
Names of 81138582090
- Cardinal: 81138582090 can be written as Eighty-one billion, one hundred thirty-eight million, five hundred eighty-two thousand and ninety.
Scientific notation
- Scientific notation: 8.113858209 × 1010
Factors of 81138582090
Divisors of 81138582090
- Number of divisors d(n): 224
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Complete list of divisors:
1 2 3 5 6 9 10 15 17 18 27 30 34 45 51 54 61 81 85 90 102 122 135 153 162 170 183 243 255 270 305 306 366 405 459 486 510 549 610 729 765 810 915 918 1037 1098 1215 1377 1458 1530 1647 1830 2074 2295 2430 2745 2754 3111 3294 3645 4131 4590 4941 5185 5490 6222 6885 7290 8235 8262 9333 9882 10370 10733 12393 13770 14823 15555 16470 18666 20655 21466 24705 24786 27999 29646 31110 32199 41310 44469 46665 49410 53665 55998 61965 64398 74115 83997 88938 93330 96597 107330 123930 139995 148230 160995 167994 182461 193194 222345 251991 279990 289791 321990 364922 419985 444690 482985 503982 547383 579582 654713 755973 839970 869373 912305 965970 1094766 1259955 1309426 1448955 1511946 1642149 1738746 1824610 1964139 2519910 2608119 2736915 2897910 3273565 3284298 3779865 3928278 4346865 4926447 5216238 5473830 5892417 6547130 7559730 7824357 8210745 8693730 9820695 9852894 11130121 11784834 13040595 14779341 15648714 16421490 17677251 19641390 22260242 24632235 26081190 29462085 29558682 33390363 35354502 39121785 44338023 49264470 53031753 55650605 58924170 66780726 73896705 78243570 88386255 88676046 100171089 106063506 111301210 133014069 147793410 159095259 166951815 176772510 200342178 221690115 265158765 266028138 300513267 318190518 333903630 443380230 477285777 500855445 530317530 601026534 665070345 795476295 901539801 954571554 1001710890 1330140690 1502566335 1590952590 1803079602 2386428885 2704619403 3005132670 4507699005 4772857770 5409238806 8113858209 9015398010 13523097015 16227716418 27046194030 40569291045 81138582090
- Sum of all divisors σ(n): 235677679056
- Sum of proper divisors (its aliquot sum) s(n): 154539096966
- 81138582090 is an abundant number, because the sum of its proper divisors (154539096966) is greater than itself. Its abundance is 73400514876
Bases of 81138582090
- Binary: 10010111001000011110010000010010010102
- Hexadecimal: 0x12E43C824A
- Base-36: 119VTEMI
Squares and roots of 81138582090
- 81138582090 squared (811385820902) is 6583469503575668768100
- 81138582090 cubed (811385820903) is 534173380752885948867131023329000
-
The
square root of 81138582090 is 284848.3492843165 -
The
cube root of 81138582090 is 4329.2148354013
Scales and comparisons
How big is 81138582090?- 81,138,582,090 seconds is equal to 2,579 years, 49 weeks, 4 days, 23 hours, 1 minute, 30 seconds.
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To count from 1 to 81,138,582,090 would take you about five thousand, one hundred fifty-nine 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 81138582090 cubic inches would be around 360.8 feet tall.
Recreational maths with 81138582090
- 81138582090 backwards is 09028583118
- 81138582090 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81138582090's digits is 45
- More coming soon!
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