81356440320
81,356,440,320 is an even composite number composed of six prime numbers multiplied together.
81356440320 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of four hundred thirty-two divisors.
Prime factorization of 81356440320:
28 × 32 × 5 × 17 × 43 × 9661
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 17 × 43 × 9661)See below for interesting mathematical facts about the number 81356440320 from the Numbermatics database.
Names of 81356440320
- Cardinal: 81356440320 can be written as Eighty-one billion, three hundred fifty-six million, four hundred forty thousand, three hundred twenty.
Scientific notation
- Scientific notation: 8.135644032 × 1010
Factors of 81356440320
Divisors of 81356440320
- Number of divisors d(n): 432
-
Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 30 32 34 36 40 43 45 48 51 60 64 68 72 80 85 86 90 96 102 120 128 129 136 144 153 160 170 172 180 192 204 215 240 255 256 258 272 288 306 320 340 344 360 384 387 408 430 480 510 516 544 576 612 640 645 680 688 720 731 765 768 774 816 860 960 1020 1032 1088 1152 1224 1280 1290 1360 1376 1440 1462 1530 1548 1632 1720 1920 1935 2040 2064 2176 2193 2304 2448 2580 2720 2752 2880 2924 3060 3096 3264 3440 3655 3840 3870 4080 4128 4352 4386 4896 5160 5440 5504 5760 5848 6120 6192 6528 6579 6880 7310 7740 8160 8256 8772 9661 9792 10320 10880 10965 11008 11520 11696 12240 12384 13056 13158 13760 14620 15480 16320 16512 17544 19322 19584 20640 21760 21930 23392 24480 24768 26316 27520 28983 29240 30960 32640 32895 33024 35088 38644 39168 41280 43860 46784 48305 48960 49536 52632 55040 57966 58480 61920 65280 65790 70176 77288 82560 86949 87720 93568 96610 97920 99072 105264 115932 116960 123840 131580 140352 144915 154576 164237 165120 173898 175440 187136 193220 195840 210528 231864 233920 247680 263160 280704 289830 309152 328474 347796 350880 386440 415423 421056 434745 463728 467840 492711 495360 526320 561408 579660 618304 656948 695592 701760 772880 821185 830846 842112 869490 927456 935680 985422 1052640 1159320 1236608 1246269 1313896 1391184 1403520 1478133 1545760 1642370 1661692 1684224 1738980 1854912 1970844 2077115 2105280 2318640 2463555 2473216 2492538 2627792 2782368 2807040 2956266 3091520 3284740 3323384 3477960 3709824 3738807 3941688 4154230 4210560 4637280 4927110 4985076 5255584 5564736 5912532 6183040 6231345 6569480 6646768 6955920 7062191 7390665 7419648 7477614 7883376 8308460 8421120 9274560 9854220 9970152 10511168 11129472 11825064 12366080 12462690 13138960 13293536 13911840 14124382 14781330 14955228 15766752 16616920 18549120 18694035 19708440 19940304 21022336 21186573 22258944 23650128 24925380 26277920 26587072 27823680 28248764 29562660 29910456 31533504 33233840 35310955 37098240 37388070 39416880 39880608 42044672 42373146 47300256 49850760 52555840 53174144 55647360 56497528 59125320 59820912 63067008 63559719 66467680 70621910 74776140 78833760 79761216 84746292 94600512 99701520 105111680 105932865 106348288 111294720 112995056 118250640 119641824 126134016 127119438 132935360 141243820 149552280 157667520 159522432 169492584 189201024 199403040 210223360 211865730 225990112 236501280 239283648 254238876 265870720 282487640 299104560 315335040 317798595 319044864 338985168 378402048 398806080 423731460 451980224 473002560 478567296 508477752 531741440 564975280 598209120 630670080 635597190 677970336 797612160 847462920 903960448 946005120 957134592 1016955504 1129950560 1196418240 1271194380 1355940672 1595224320 1694925840 1807920896 1892010240 2033911008 2259901120 2392836480 2542388760 2711881344 3389851680 4067822016 4519802240 4785672960 5084777520 5423762688 6779703360 8135644032 9039604480 10169555040 13559406720 16271288064 20339110080 27118813440 40678220160 81356440320
- Sum of all divisors σ(n): 305005532832
- Sum of proper divisors (its aliquot sum) s(n): 223649092512
- 81356440320 is an abundant number, because the sum of its proper divisors (223649092512) is greater than itself. Its abundance is 142292652192
Bases of 81356440320
- Binary: 10010111100010011100011000011000000002
- Hexadecimal: 0x12F138C300
- Base-36: 11DHIV40
Squares and roots of 81356440320
- 81356440320 squared (813564403202) is 6618870381541721702400
- 81356440320 cubed (813564403203) is 538487733181714711271354400768000
-
The
square root of 81356440320 is 285230.5038385621 -
The
cube root of 81356440320 is 4333.0860402205
Scales and comparisons
How big is 81356440320?- 81,356,440,320 seconds is equal to 2,586 years, 45 weeks, 6 days, 11 hours, 12 minutes.
-
To count from 1 to 81,356,440,320 would take you about five thousand, one hundred seventy-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 81356440320 cubic inches would be around 361.1 feet tall.
Recreational maths with 81356440320
- 81356440320 backwards is 02304465318
- 81356440320 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81356440320's digits is 36
- More coming soon!
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