81379816440
81,379,816,440 is an even composite number composed of seven prime numbers multiplied together.
What does the number 81379816440 look like?
This visualization shows the relationship between its 7 prime factors (large circles) and 256 divisors.
81379816440 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 81379816440:
23 × 3 × 5 × 13 × 89 × 193 × 3037
(2 × 2 × 2 × 3 × 5 × 13 × 89 × 193 × 3037)See below for interesting mathematical facts about the number 81379816440 from the Numbermatics database.
Names of 81379816440
- Cardinal: 81379816440 can be written as Eighty-one billion, three hundred seventy-nine million, eight hundred sixteen thousand, four hundred forty.
Scientific notation
- Scientific notation: 8.137981644 × 1010
Factors of 81379816440
Divisors of 81379816440
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 13 15 20 24 26 30 39 40 52 60 65 78 89 104 120 130 156 178 193 195 260 267 312 356 386 390 445 520 534 579 712 772 780 890 965 1068 1157 1158 1335 1544 1560 1780 1930 2136 2314 2316 2509 2670 2895 3037 3471 3560 3860 4628 4632 5018 5340 5785 5790 6074 6942 7527 7720 9111 9256 10036 10680 11570 11580 12148 12545 13884 15054 15185 17177 17355 18222 20072 23140 23160 24296 25090 27768 30108 30370 34354 34710 36444 37635 39481 45555 46280 50180 51531 60216 60740 68708 69420 72888 75270 78962 85885 91110 100360 103062 118443 121480 137416 138840 150540 157924 171770 182220 197405 206124 223301 236886 257655 270293 301080 315848 343540 364440 394810 412248 446602 473772 515310 540586 586141 592215 669903 687080 789620 810879 893204 947544 1030620 1081172 1116505 1172282 1184430 1339806 1351465 1579240 1621758 1758423 1786408 2061240 2162344 2233010 2344564 2368860 2679612 2702930 2930705 3243516 3349515 3513809 3516846 4054395 4466020 4689128 4737720 5359224 5405860 5861410 6487032 6699030 7027618 7033692 7619833 8108790 8792115 8932040 10541427 10811720 11722820 13398060 14055236 14067384 15239666 16217580 17569045 17584230 21082854 22859499 23445640 26796120 28110472 30479332 32435160 35138090 35168460 38099165 42165708 45718998 52166549 52707135 60958664 70276180 70336920 76198330 84331416 91437996 104333098 105414270 114297495 140552360 152396660 156499647 182875992 208666196 210828540 228594990 260832745 304793320 312999294 417332392 421657080 457189980 521665490 625998588 678165137 782498235 914379960 1043330980 1251997176 1356330274 1564996470 2034495411 2086661960 2712660548 3129992940 3390825685 4068990822 5425321096 6259985880 6781651370 8137981644 10172477055 13563302740 16275963288 20344954110 27126605480 40689908220 81379816440
- Sum of all divisors σ(n): 267339139200
- Sum of proper divisors (its aliquot sum) s(n): 185959322760
- 81379816440 is an abundant number, because the sum of its proper divisors (185959322760) is greater than itself. Its abundance is 104579506320
Bases of 81379816440
- Binary: 10010111100101001110101110011111110002
- Hexadecimal: 0x12F29D73F8
- Base-36: 11DVFW8O
Squares and roots of 81379816440
- 81379816440 squared (813798164402) is 6622674523808094273600
- 81379816440 cubed (813798164403) is 538952037089367121771783137984000
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The
square root of 81379816440 is 285271.4784902269 -
The
cube root of 81379816440 is 4333.5010085545
Scales and comparisons
How big is 81379816440?- 81,379,816,440 seconds is equal to 2,587 years, 32 weeks, 4 days, 34 minutes.
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To count from 1 to 81,379,816,440 would take you about five thousand, one hundred seventy-five 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 81379816440 cubic inches would be around 361.1 feet tall.
Recreational maths with 81379816440
- 81379816440 backwards is 04461897318
- The number of decimal digits it has is: 11
- The sum of 81379816440's digits is 51
- More coming soon!
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