81444906400

Names of 81444906400

• Cardinal: 81444906400 can be written as Eighty-one billion, four hundred forty-four million, nine hundred six thousand, four hundred.

Scientific notation

• Scientific notation: 8.14449064 × 10¹⁰

Factors of 81444906400

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 1153

Divisors of 81444906400

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 4 5 8 10 11 13 16 20 22 25 26 32 40 44 50 52 55 61 65 80 88 100 104 110 121 122 130 143 160 176 200 208 220 242 244 260 275 286 305 325 352 400 416 440 484 488 520 550 572 605 610 650 671 715 793 800 880 968 976 1040 1061 1100 1144 1210 1220 1300 1342 1430 1525 1573 1586 1760 1936 1952 2080 2122 2200 2288 2420 2440 2600 2684 2860 3025 3050 3146 3172 3355 3575 3872 3965 4244 4400 4576 4840 4880 5200 5305 5368 5720 6050 6100 6292 6344 6710 7150 7381 7865 7930 8488 8723 8800 9680 9760 10400 10610 10736 11440 11671 12100 12200 12584 12688 13420 13793 14300 14762 15730 15860 16775 16976 17446 19360 19825 21220 21472 22880 23342 24200 24400 25168 25376 26525 26840 27586 28600 29524 31460 31720 33550 33952 34892 36905 39325 39650 42440 43615 46684 48400 48800 50336 53050 53680 55172 57200 58355 59048 62920 63440 64721 67100 68965 69784 73810 78650 79300 84880 87230 93368 95953 96800 106100 107360 110344 114400 116710 118096 125840 126880 128381 129442 134200 137930 139568 147620 151723 157300 158600 169760 174460 184525 186736 191906 212200 218075 220688 233420 236192 251680 256762 258884 268400 275860 279136 291775 295240 303446 314600 317200 323605 344825 348920 369050 373472 383812 424400 436150 441376 466840 479765 513524 517768 536800 551720 583550 590480 606892 629200 634400 641905 647210 689650 697840 711931 738100 758615 767624 841373 848800 872300 933680 959530 1027048 1035536 1103440 1167100 1180960 1213784 1258400 1283810 1294420 1379300 1395680 1423862 1476200 1517230 1535248 1618025 1668953 1682746 1744600 1867360 1919060 2054096 2071072 2206880 2334200 2398825 2427568 2567620 2588840 2758600 2847724 2952400 3034460 3070496 3209525 3236050 3337906 3365492 3489200 3559655 3793075 3838120 4108192 4206865 4668400 4797650 4855136 5135240 5177680 5517200 5695448 5904800 6068920 6419050 6472100 6675812 6730984 6978400 7119310 7586150 7676240 7831241 8344765 8413730 9255103 9336800 9595300 10270480 10355360 11034400 11390896 12137840 12838100 12944200 13351624 13461968 14238620 15172300 15352480 15662482 16689530 16827460 17798275 18510206 19190600 20540960 21034325 22781792 24275680 25676200 25888400 26703248 26923936 28477240 30344600 31324964 33379060 33654920 35596550 37020412 38381200 39156205 41723825 42068650 46275515 51352400 51776800 53406496 56954480 60689200 62649928 66758120 67309840 71193100 74040824 76762400 78312410 83447650 84137300 92551030 101806133 102704800 113908960 121378400 125299856 133516240 134619680 142386200 148081648 156624820 166895300 168274600 185102060 195781025 203612266 231377575 250599712 267032480 284772400 296163296 313249640 333790600 336549200 370204120 391562050 407224532 462755150 509030665 569544800 626499280 667581200 673098400 740408240 783124100 814449064 925510300 1018061330 1252998560 1335162400 1480816480 1566248200 1628898128 1851020600 2036122660 2545153325 3132496400 3257796256 3702041200 4072245320 5090306650 6264992800 7404082400 8144490640 10180613300 16288981280 20361226600 40722453200 81444906400
• Sum of all divisors σ(n): 239440784184
• Sum of proper divisors (its aliquot sum) s(n): 157995877784
• 81444906400 is an abundant number, because the sum of its proper divisors (157995877784) is greater than itself. Its abundance is 76550971384

Bases of 81444906400

• Binary: 1001011110110011111101010010110100000₂
• Hexadecimal: 0x12F67EA5A0
• Base-36: 11EY6ZZ4

Squares and roots of 81444906400

• 81444906400 squared (81444906400²) is 6633272778504760960000
• 81444906400 cubed (81444906400³) is 540246280570988188341574144000000
• The square root of 81444906400 is 285385.5399280069
• The cube root of 81444906400 is 4334.6560543269

Scales and comparisons

• 81,444,906,400 seconds is equal to 2,589 years, 36 weeks, 1 day, 9 hours, 6 minutes, 40 seconds.
• To count from 1 to 81,444,906,400 would take you about five thousand, one hundred seventy-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 81444906400 cubic inches would be around 361.2 feet tall.

Recreational maths with 81444906400

• 81444906400 backwards is 00460944418
• 81444906400 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81444906400's digits is 40
• More coming soon!