81342721746
81,342,721,746 is an even composite number composed of seven prime numbers multiplied together.
What does the number 81342721746 look like?
This visualization shows the relationship between its 7 prime factors (large circles) and 256 divisors.
81342721746 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 81342721746:
2 × 33 × 11 × 13 × 31 × 373 × 911
(2 × 3 × 3 × 3 × 11 × 13 × 31 × 373 × 911)See below for interesting mathematical facts about the number 81342721746 from the Numbermatics database.
Names of 81342721746
- Cardinal: 81342721746 can be written as Eighty-one billion, three hundred forty-two million, seven hundred twenty-one thousand, seven hundred forty-six.
Scientific notation
- Scientific notation: 8.1342721746 × 1010
Factors of 81342721746
Divisors of 81342721746
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 3 6 9 11 13 18 22 26 27 31 33 39 54 62 66 78 93 99 117 143 186 198 234 279 286 297 341 351 373 403 429 558 594 682 702 746 806 837 858 911 1023 1119 1209 1287 1674 1822 2046 2238 2418 2574 2733 3069 3357 3627 3861 4103 4433 4849 5466 6138 6714 7254 7722 8199 8206 8866 9207 9698 10021 10071 10881 11563 11843 12309 13299 14547 16398 18414 20042 20142 21762 23126 23686 24597 24618 26598 28241 29094 30063 34689 35529 36927 39897 43641 49194 53339 56482 60126 69378 71058 73854 79794 84723 87282 90189 104067 106587 106678 110781 119691 127193 130273 130923 150319 160017 169446 180378 208134 213174 221562 239382 254169 254386 260546 261846 270567 300638 310651 312201 319761 320034 339803 367133 381579 390819 450957 480051 508338 541134 621302 624402 639522 679606 734266 762507 763158 781638 901914 931953 960102 1019409 1101399 1144737 1172457 1352871 1440153 1525014 1653509 1863906 2038818 2202798 2289474 2344914 2705742 2795859 2880306 3058227 3304197 3307018 3434211 3517371 3737833 4038463 4058613 4417439 4960527 5591718 6116454 6608394 6868422 7034742 7475666 8076926 8117226 8387577 8834878 9174681 9912591 9921054 10533893 11213499 12115389 13252317 14881581 16775154 18349362 19825182 21067786 22426998 24230778 26504634 29763162 31601679 33640497 36346167 39756951 44644743 48591829 63203358 67280994 72692334 79513902 89289486 94805037 97183658 100921491 109038501 115872823 119270853 136940609 145775487 189610074 201842982 218077002 231745646 238541706 273881218 284415111 291550974 347618469 410821827 437326461 568830222 695236938 821643654 874652922 1042855407 1232465481 1311979383 1506346699 2085710814 2464930962 2623958766 3012693398 3128566221 3697396443 4519040097 6257132442 7394792886 9038080194 13557120291 27114240582 40671360873 81342721746
- Sum of all divisors σ(n): 220042690560
- Sum of proper divisors (its aliquot sum) s(n): 138699968814
- 81342721746 is an abundant number, because the sum of its proper divisors (138699968814) is greater than itself. Its abundance is 57357247068
Bases of 81342721746
- Binary: 10010111100000110011101101110110100102
- Hexadecimal: 0x12F0676ED2
- Base-36: 11D9CTSI
Squares and roots of 81342721746
- 81342721746 squared (813427217462) is 6616638381047181288516
- 81342721746 cubed (813427217463) is 538215374723424787649374733268936
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The
square root of 81342721746 is 285206.4546008733 -
The
cube root of 81342721746 is 4332.8424737503
Scales and comparisons
How big is 81342721746?- 81,342,721,746 seconds is equal to 2,586 years, 23 weeks, 1 day, 16 hours, 29 minutes, 6 seconds.
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To count from 1 to 81,342,721,746 would take you about five thousand, one hundred seventy-two 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 81342721746 cubic inches would be around 361.1 feet tall.
Recreational maths with 81342721746
- 81342721746 backwards is 64712724318
- The number of decimal digits it has is: 11
- The sum of 81342721746's digits is 45
- More coming soon!
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