81449785120

Names of 81449785120

• Cardinal: 81449785120 can be written as Eighty-one billion, four hundred forty-nine million, seven hundred eighty-five thousand, one hundred twenty.

Scientific notation

• Scientific notation: 8.144978512 × 10¹⁰

Factors of 81449785120

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 893

Divisors of 81449785120

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 29 32 40 44 55 58 80 88 110 116 121 145 160 176 220 232 239 242 290 319 352 440 464 478 484 580 605 607 638 880 928 956 968 1160 1195 1210 1214 1276 1595 1760 1912 1936 2320 2390 2420 2428 2552 2629 3035 3190 3509 3824 3872 4640 4780 4840 4856 5104 5258 6070 6380 6677 6931 7018 7648 9560 9680 9712 10208 10516 12140 12760 13145 13354 13862 14036 17545 17603 19120 19360 19424 21032 24280 25520 26290 26708 27724 28072 28919 33385 34655 35090 35206 38240 42064 48560 51040 52580 53416 55448 56144 57838 66770 69310 70180 70412 73447 76241 84128 88015 97120 105160 106832 110896 112288 115676 133540 138620 140360 140824 144595 145073 146894 152482 176030 193633 210320 213664 221792 231352 267080 277240 280720 281648 289190 290146 293788 304964 352060 367235 381205 387266 420640 462704 534160 554480 561440 563296 578380 580292 587576 609928 704120 725365 734470 762410 774532 838651 925408 968165 1068320 1108960 1156760 1160584 1175152 1219856 1408240 1450730 1468940 1524820 1549064 1595803 1677302 1936330 2129963 2313520 2321168 2350304 2439712 2816480 2901460 2937880 3049640 3098128 3191606 3354604 3872660 4193255 4207117 4259926 4627040 4642336 5802920 5875760 6099280 6196256 6383212 6709208 7745320 7979015 8386510 8414234 8519852 10649815 11605840 11751520 12198560 12766424 13418416 15490640 15958030 16773020 16828468 17039704 17553833 21035585 21299630 23211680 25532848 26836832 30981280 31916060 33546040 33656936 34079408 35107666 42071170 42599260 46278287 51065696 63832120 67092080 67313872 68158816 70215332 84142340 85198520 87769165 92556574 127664240 134184160 134627744 140430664 168284680 170397040 175538330 185113148 231391435 255328480 280861328 336569360 340794080 351076660 370226296 462782870 509061157 561722656 673138720 702153320 740452592 925565740 1018122314 1404306640 1480905184 1851131480 2036244628 2545305785 2808613280 3702262960 4072489256 5090611570 7404525920 8144978512 10181223140 16289957024 20362446280 40724892560 81449785120
• Sum of all divisors σ(n): 220079462400
• Sum of proper divisors (its aliquot sum) s(n): 138629677280
• 81449785120 is an abundant number, because the sum of its proper divisors (138629677280) is greater than itself. Its abundance is 57179892160

Bases of 81449785120

• Binary: 1001011110110110010010001011100100000₂
• Hexadecimal: 0x12F6C91720
• Base-36: 11F13KF4

Squares and roots of 81449785120

• 81449785120 squared (81449785120²) is 6634067496094173414400
• 81449785120 cubed (81449785120³) is 540343372028446863886896713728000
• The square root of 81449785120 is 285394.0873949565
• The cube root of 81449785120 is 4334.7426042491

Scales and comparisons

• 81,449,785,120 seconds is equal to 2,589 years, 44 weeks, 1 day, 20 hours, 18 minutes, 40 seconds.
• To count from 1 to 81,449,785,120 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 81449785120 cubic inches would be around 361.2 feet tall.

Recreational maths with 81449785120

• 81449785120 backwards is 02158794418
• The number of decimal digits it has is: 11
• The sum of 81449785120's digits is 49
• More coming soon!