81664128
81,664,128 is an even composite number composed of six prime numbers multiplied together.
81664128 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 81664128:
27 × 32 × 7 × 13 × 19 × 41
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 7 × 13 × 19 × 41)See below for interesting mathematical facts about the number 81664128 from the Numbermatics database.
Names of 81664128
- Cardinal: 81664128 can be written as Eighty-one million, six hundred sixty-four thousand, one hundred twenty-eight.
Scientific notation
- Scientific notation: 8.1664128 × 107
Factors of 81664128
Divisors of 81664128
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 3 4 6 7 8 9 12 13 14 16 18 19 21 24 26 28 32 36 38 39 41 42 48 52 56 57 63 64 72 76 78 82 84 91 96 104 112 114 117 123 126 128 133 144 152 156 164 168 171 182 192 208 224 228 234 246 247 252 266 273 287 288 304 312 328 336 342 364 369 384 399 416 448 456 468 492 494 504 532 533 546 574 576 608 624 656 672 684 728 738 741 779 798 819 832 861 896 912 936 984 988 1008 1064 1066 1092 1148 1152 1197 1216 1248 1312 1344 1368 1456 1476 1482 1558 1596 1599 1638 1664 1722 1729 1824 1872 1968 1976 2016 2128 2132 2184 2223 2296 2337 2394 2432 2496 2583 2624 2688 2736 2912 2952 2964 3116 3192 3198 3276 3444 3458 3648 3731 3744 3936 3952 4032 4256 4264 4368 4446 4592 4674 4788 4797 4992 5166 5187 5248 5453 5472 5824 5904 5928 6232 6384 6396 6552 6888 6916 7011 7296 7462 7488 7872 7904 8064 8512 8528 8736 8892 9184 9348 9576 9594 10127 10332 10374 10906 10944 11193 11648 11808 11856 12464 12768 12792 13104 13776 13832 14022 14924 14976 15561 15744 15808 16359 17024 17056 17472 17784 18368 18696 19152 19188 20254 20664 20748 21812 21888 22386 23616 23712 24928 25536 25584 26208 27552 27664 28044 29848 30381 31122 31616 32718 33579 34112 34944 35568 36736 37392 38304 38376 40508 41328 41496 43624 44772 47232 47424 49077 49856 51072 51168 52416 55104 55328 56088 59696 60762 62244 65436 67158 68224 70889 71136 74784 76608 76752 81016 82656 82992 87248 89544 91143 94848 98154 99712 102336 104832 110208 110656 112176 119392 121524 124488 130872 134316 141778 142272 149568 153216 153504 162032 165312 165984 174496 179088 182286 196308 204672 212667 221312 224352 238784 243048 248976 261744 268632 283556 284544 299136 307008 324064 330624 331968 348992 358176 364572 392616 425334 448704 477568 486096 497952 523488 537264 567112 614016 638001 648128 663936 697984 716352 729144 785232 850668 897408 972192 995904 1046976 1074528 1134224 1276002 1296256 1432704 1458288 1570464 1701336 1944384 1991808 2093952 2149056 2268448 2552004 2916576 3140928 3402672 3888768 4298112 4536896 5104008 5833152 6281856 6805344 9073792 10208016 11666304 13610688 20416032 27221376 40832064 81664128
- Sum of all divisors σ(n): 311875200
- Sum of proper divisors (its aliquot sum) s(n): 230211072
- 81664128 is an abundant number, because the sum of its proper divisors (230211072) is greater than itself. Its abundance is 148546944
Bases of 81664128
- Binary: 1001101111000011000100000002
- Hexadecimal: 0x4DE1880
- Base-36: 1CMCG0
Squares and roots of 81664128
- 81664128 squared (816641282) is 6669029802000384
- 81664128 cubed (816641283) is 544620503386374015025152
-
The
square root of 81664128 is 9036.8206798631 -
The
cube root of 81664128 is 433.8541703201
Scales and comparisons
How big is 81664128?- 81,664,128 seconds is equal to 2 years, 31 weeks, 4 hours, 28 minutes, 48 seconds.
-
To count from 1 to 81,664,128 would take you about three 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 81664128 cubic inches would be around 36.2 feet tall.
Recreational maths with 81664128
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 81664128 - Facts about the integer". Numbermatics.com. 2024. Web. 28 April 2024.
APA style:
Numbermatics. (2024). Number 81664128 - Facts about the integer. Retrieved 28 April 2024, from https://numbermatics.com/n/81664128/
Chicago style:
Numbermatics. 2024. "Number 81664128 - Facts about the integer". https://numbermatics.com/n/81664128/
The information we have on file for 81664128 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!
Keywords: Divisors of 81664128, math, Factors of 81664128, curriculum, school, college, exams, university, Prime factorization of 81664128, STEM, science, technology, engineering, physics, economics, calculator, eighty-one million, six hundred sixty-four thousand, one hundred twenty-eight.