81802013040

Names of 81802013040

• Cardinal: 81802013040 can be written as Eighty-one billion, eight hundred two million, thirteen thousand and forty.

Scientific notation

• Scientific notation: 8.180201304 × 10¹⁰

Factors of 81802013040

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 2800

Divisors of 81802013040

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 17 18 20 22 24 30 33 34 36 40 44 45 48 51 55 60 66 68 72 80 85 88 90 99 102 110 120 132 136 144 153 165 170 176 180 187 198 204 220 240 241 255 264 272 306 330 340 360 374 396 408 440 482 495 510 528 561 612 660 680 720 723 748 765 792 816 880 935 964 990 1020 1122 1205 1224 1320 1360 1446 1496 1530 1584 1683 1870 1928 1980 2040 2169 2244 2410 2448 2521 2640 2651 2805 2892 2992 3060 3366 3615 3740 3856 3960 4080 4097 4338 4488 4820 5042 5302 5610 5784 6120 6732 7230 7480 7563 7920 7953 8194 8415 8676 8976 9640 10084 10604 10845 11220 11568 12240 12291 12605 13255 13464 14460 14960 15126 15906 16388 16830 17352 19280 20168 20485 21208 21690 22440 22689 23859 24582 25210 26510 26928 27731 28920 30252 31812 32776 33660 34704 36873 37815 39765 40336 40970 42416 42857 43380 44880 45067 45378 47718 49164 50420 53020 55462 57840 60504 61455 63624 65552 67320 73746 75630 79530 81940 83193 85714 86760 90134 90756 95436 98328 100840 106040 110924 113445 119295 121008 122910 127248 128571 134640 135201 138655 147492 151260 159060 163880 166386 171428 173520 180268 181512 184365 190872 196656 201680 212080 214285 221848 225335 226890 238590 245820 249579 257142 270402 277310 294984 302520 318120 327760 332772 342856 360536 363024 368730 381744 385713 405603 415965 428570 443696 450670 453780 471427 477180 491640 499158 514284 540804 554620 589968 605040 607561 636240 642855 665544 676005 685712 721072 737460 771426 811206 831930 857140 901340 907560 942854 954360 983280 998316 1028568 1081608 1109240 1215122 1247895 1285710 1331088 1352010 1414281 1474920 1542852 1622412 1663860 1714280 1802680 1815120 1822683 1885708 1908720 1928565 1996632 2028015 2057136 2163216 2218480 2357135 2430244 2495790 2571420 2704020 2828562 2949840 3037805 3085704 3244824 3327720 3428560 3605360 3645366 3771416 3857130 3993264 4056030 4242843 4714270 4860488 4991580 5142840 5408040 5468049 5657124 6075610 6171408 6489648 6655440 6683171 7071405 7290732 7542832 7714260 8112060 8485686 9113415 9428540 9720976 9983160 10285680 10328537 10816080 10936098 11314248 12151220 13366342 14142810 14581464 15428520 16224120 16971372 18226830 18857080 19966320 20049513 20657074 21214215 21872196 22628496 24302440 26732684 27340245 28285620 29162928 30857040 30985611 32448240 33415855 33942744 36453660 37714160 40099026 41314148 42428430 43744392 48604880 51642685 53465368 54680490 56571240 60148539 61971222 66831710 67885488 72907320 80198052 82628296 84856860 87488784 92956833 100247565 103285370 106930736 109360980 113142480 113613907 120297078 123942444 133663420 145814640 154928055 160396104 165256592 169713720 185913666 200495130 206570740 218721960 227227814 240594156 247884888 267326840 300742695 309856110 320792208 339427440 340841721 371827332 400990260 413141480 437443920 454455628 464784165 481188312 495769776 534653680 568069535 601485390 619712220 681683442 743654664 801980520 826282960 908911256 929568330 962376624 1022525163 1136139070 1202970780 1239424440 1363366884 1487309328 1603961040 1704208605 1817822512 1859136660 2045050326 2272278140 2405941560 2478848880 2726733768 3408417210 3718273320 4090100652 4544556280 4811883120 5112625815 5453467536 6816834420 7436546640 8180201304 9089112560 10225251630 13633668840 16360402608 20450503260 27267337680 40901006520 81802013040
• Sum of all divisors σ(n): 318764901312
• Sum of proper divisors (its aliquot sum) s(n): 236962888272
• 81802013040 is an abundant number, because the sum of its proper divisors (236962888272) is greater than itself. Its abundance is 155160875232

Bases of 81802013040

• Binary: 1001100001011110001111010100101110000₂
• Hexadecimal: 0x130BC7A970
• Base-36: 11KUT180

Squares and roots of 81802013040

• 81802013040 squared (81802013040²) is 6691569337396330041600
• 81802013040 cubed (81802013040³) is 547383842195758749711106942464000
• The square root of 81802013040 is 286010.5121145027
• The cube root of 81802013040 is 4340.9821203903

Scales and comparisons

• 81,802,013,040 seconds is equal to 2,601 years, 2 weeks, 4 days, 13 hours, 24 minutes.
• To count from 1 to 81,802,013,040 would take you about five thousand, two hundred two 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 81802013040 cubic inches would be around 361.7 feet tall.

Recreational maths with 81802013040

• 81802013040 backwards is 04031020818
• The number of decimal digits it has is: 11
• The sum of 81802013040's digits is 27
• More coming soon!