81681823080

Names of 81681823080

• Cardinal: 81681823080 can be written as Eighty-one billion, six hundred eighty-one million, eight hundred twenty-three thousand and eighty.

Scientific notation

• Scientific notation: 8.168182308 × 10¹⁰

Factors of 81681823080

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 151

Divisors of 81681823080

• Number of divisors d(n): 1152
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 13 15 18 19 20 22 24 26 30 33 36 37 38 39 40 44 45 52 55 57 60 61 65 66 72 74 76 78 88 90 95 99 104 110 111 114 117 120 122 130 132 143 148 152 156 165 171 180 183 185 190 195 198 209 220 222 228 234 244 247 260 264 285 286 296 305 312 330 333 342 360 366 370 380 390 396 407 418 429 440 444 456 468 481 488 494 495 520 549 555 570 572 585 610 627 660 666 671 684 703 715 732 740 741 760 780 792 793 814 836 855 858 888 915 936 962 988 990 1045 1098 1110 1140 1144 1159 1170 1220 1221 1235 1254 1287 1320 1332 1342 1368 1369 1406 1430 1443 1464 1480 1482 1560 1586 1628 1665 1672 1710 1716 1830 1881 1924 1976 1980 2013 2035 2090 2109 2145 2196 2220 2223 2257 2280 2318 2340 2379 2405 2440 2442 2470 2508 2574 2664 2684 2717 2738 2745 2812 2860 2886 2964 3135 3172 3256 3330 3355 3420 3432 3477 3515 3660 3663 3705 3762 3848 3960 3965 4026 4070 4107 4180 4218 4290 4329 4392 4440 4446 4514 4636 4680 4758 4810 4884 4940 5016 5148 5291 5368 5434 5476 5490 5624 5720 5772 5795 5928 6039 6105 6270 6327 6344 6435 6660 6710 6771 6840 6845 6954 7030 7137 7215 7320 7326 7410 7524 7733 7930 8052 8140 8151 8214 8360 8436 8580 8658 8723 8892 9028 9139 9272 9405 9516 9620 9768 9880 10065 10296 10431 10545 10582 10868 10952 10980 11115 11285 11544 11590 11895 12078 12210 12321 12540 12654 12749 12870 13320 13420 13542 13585 13690 13908 14060 14274 14430 14652 14820 15048 15059 15067 15466 15860 15873 16104 16280 16302 16428 16872 17160 17316 17385 17446 17784 17797 18056 18278 18315 18810 19032 19240 20130 20313 20535 20862 21090 21164 21645 21736 21960 22230 22570 23180 23199 23790 24156 24420 24453 24642 24827 25080 25308 25498 25740 26011 26169 26455 26840 27084 27170 27380 27417 27816 28120 28548 28860 29304 29341 29640 30118 30134 30195 30932 31635 31720 31746 32604 32856 33855 34632 34770 34892 35594 35685 36556 36630 37620 38247 38665 40260 40626 40755 41070 41724 42180 42328 42883 43290 43615 44460 45140 45177 45201 45695 46360 46398 47580 47619 48312 48840 48906 49284 49654 50616 50996 51480 52022 52155 52338 52910 53391 54168 54340 54760 54834 57096 57720 58682 60236 60268 60390 61605 61864 63270 63492 63745 65208 67710 69540 69597 69784 71188 71370 73112 73260 74481 75240 75295 75335 76494 77330 78033 78507 79365 80520 81252 81510 82140 82251 83448 83509 84360 85766 86580 87230 88023 88920 88985 90280 90354 90402 91390 92796 95160 95238 97812 98568 99308 100529 101565 101992 104044 104310 104676 105820 106782 108680 109668 114741 115995 117364 120472 120536 120780 122265 123210 124135 126540 126984 127490 128649 130055 130845 135420 135531 135603 137085 139080 139194 142376 142740 146520 146705 148962 150590 150670 152988 154660 156066 157014 158730 160173 162504 163020 164280 164502 165737 167018 171532 173160 174460 176046 177970 180708 180804 182780 185592 190476 191235 195624 195767 198616 201058 203130 208088 208620 209352 211640 213564 214415 219336 223443 225885 226005 229482 231990 234099 234728 238095 241560 244530 246420 248270 250527 253080 254980 257298 260110 261690 264069 266955 270840 271062 271206 274170 278388 285480 286121 293410 297924 301180 301340 301587 305976 309320 312132 314028 317460 320346 322751 326040 329004 331474 334036 338143 343064 347985 348920 352092 355940 361416 361608 365560 372405 380952 382470 385947 390165 391534 392535 402116 406260 411255 417240 417545 427128 428830 440115 446886 451770 452010 458964 463980 468198 471713 476190 489060 492840 496540 497211 501054 502645 509960 514596 520220 523380 528138 533910 542124 542412 548340 556776 557479 572242 573705 586820 587301 595848 602360 602680 603174 624264 628056 634920 640692 643245 645502 658008 662948 668072 676286 677655 678015 695970 704184 711880 744810 751581 764940 771894 780330 783068 785070 800865 804232 812520 822510 828685 835090 857660 858363 880230 893772 903540 904020 904761 917928 918599 927960 936396 943426 952380 968253 978120 978835 993080 994422 1002108 1005290 1014429 1029192 1040440 1046760 1056276 1067820 1084248 1084824 1085617 1096680 1114958 1117215 1144484 1147410 1170495 1173640 1174602 1206348 1252635 1281384 1286490 1291004 1320345 1325896 1352572 1355310 1356030 1391940 1415139 1430605 1489620 1491633 1503162 1507935 1529880 1543788 1560660 1566136 1570140 1586671 1601730 1613755 1645020 1657370 1670180 1672437 1690715 1715320 1716726 1760460 1761903 1787544 1807080 1808040 1809522 1837198 1872792 1886852 1904760 1929735 1936506 1957670 1988844 2004216 2010580 2028858 2112552 2135640 2171234 2229916 2234430 2288968 2294820 2340990 2349204 2358565 2412696 2486055 2505270 2572980 2575089 2582008 2640690 2705144 2710620 2712060 2755797 2783880 2787395 2830278 2861210 2904759 2936505 2979240 2983266 3006324 3015870 3043287 3087576 3121320 3140280 3173342 3203460 3227510 3256851 3290040 3314740 3340360 3344874 3381430 3433452 3520920 3523806 3619044 3674396 3719573 3757905 3773704 3859470 3873012 3915340 3977688 4021160 4057716 4245417 4291815 4342468 4459832 4468860 4523805 4589640 4592995 4681980 4698408 4717130 4760013 4841265 4972110 5010540 5017311 5072145 5145960 5150178 5281380 5421240 5424120 5428085 5511594 5574790 5660556 5722420 5809518 5873010 5966532 6012648 6031740 6086574 6132269 6346684 6406920 6455020 6513702 6629480 6689748 6762860 6866904 7047612 7075695 7238088 7348792 7439146 7458165 7515810 7718940 7746024 7830680 7933355 8115432 8267391 8362185 8490834 8583630 8684936 8809515 8937720 9047610 9185990 9363960 9434260 9520026 9682530 9770553 9944220 10021080 10034622 10144290 10300356 10562760 10856170 11023188 11149580 11158719 11321112 11444840 11619036 11746020 11933064 11941787 12063480 12173148 12264538 12693368 12875445 12910040 13027404 13379496 13525720 13778985 14095224 14151390 14280039 14523795 14878292 14916330 15031620 15216435 15437880 15866710 16284255 16534782 16724370 16981668 17167260 17453381 17619030 18095220 18371980 18396807 18597865 18868520 19040052 19365060 19541106 19888440 20069244 20288580 20600712 20626723 21227085 21712340 22046376 22299160 22317438 23238072 23492040 23800065 23883574 24346296 24529076 25086555 25750890 26054808 27557970 28302780 28560078 29047590 29756584 29832660 30063240 30432870 30661345 31733420 32568510 33069564 33448740 33476157 33963336 34334520 34906762 35238060 35825361 36190440 36743960 36793614 37195730 38080104 38730120 39082212 40138488 40577160 41253446 41336955 42454170 43424680 44634876 47600130 47767148 48852765 49058152 50173110 51501780 52360143 55115940 55190421 55793595 56605560 57120156 58095180 59665320 59708935 60865740 61322690 61880169 63466840 65137020 66139128 66897480 66952314 69813524 70476120 71400195 71650722 73587228 74391460 78164424 82506892 82673910 84908340 87266905 89269752 91984035 95200260 95534296 97705530 100346220 103003560 103133615 104720286 107476083 110231880 110380842 111587190 114240312 116190360 119417870 121731480 122645380 123760338 130274040 133904628 139627048 142800390 143301444 147174456 148782920 157080429 165013784 165347820 167380785 169816680 174533810 179126805 183968070 185640507 190400520 195411060 200692440 206267230 209440572 214952166 220761684 223174380 226893953 238835740 245290760 247520676 261800715 267809256 275952105 285600780 286602888 309400845 314160858 330695640 334761570 349067620 358253610 367936140 371281014 390822120 412534460 418881144 429904332 441523368 446348760 453787906 477671480 495041352 523601430 537380415 551904210 571201560 618801690 628321716 669523140 680681859 698135240 716507220 735872280 742562028 785402145 825068920 859808664 907575812 928202535 1047202860 1074760830 1103808420 1134469765 1237603380 1256643432 1339046280 1361363718 1433014440 1485124056 1570804290 1815151624 1856405070 2042045577 2094405720 2149521660 2207616840 2268939530 2475206760 2722727436 3141608580 3403409295 3712810140 4084091154 4299043320 4537879060 5445454872 6283217160 6806818590 7425620280 8168182308 9075758120 10210227885 13613637180 16336364616 20420455770 27227274360 40840911540 81681823080
• Sum of all divisors σ(n): 342934300800
• Sum of proper divisors (its aliquot sum) s(n): 261252477720
• 81681823080 is an abundant number, because the sum of its proper divisors (261252477720) is greater than itself. Its abundance is 179570654640

Bases of 81681823080

• Binary: 1001100000100100111011011010101101000₂
• Hexadecimal: 0x13049DB568
• Base-36: 11IV8Y20

Squares and roots of 81681823080

• 81681823080 squared (81681823080²) is 6671920221672420686400
• 81681823080 cubed (81681823080³) is 544974607150521048221856962112000
• The square root of 81681823080 is 285800.3202937323
• The cube root of 81681823080 is 4338.8550406883

Scales and comparisons

• 81,681,823,080 seconds is equal to 2,597 years, 11 weeks, 6 days, 11 hours, 18 minutes.
• To count from 1 to 81,681,823,080 would take you about five thousand, one hundred ninety-four 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 81681823080 cubic inches would be around 361.6 feet tall.

Recreational maths with 81681823080

• 81681823080 backwards is 08032818618
• 81681823080 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81681823080's digits is 45
• More coming soon!