81998049043768

Names of 81998049043768

• Cardinal: 81998049043768 can be written as Eighty-one trillion, nine hundred ninety-eight billion, forty-nine million, forty-three thousand, seven hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1998049043768 × 10¹³

Factors of 81998049043768

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2754

Divisors of 81998049043768

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 8 11 13 22 26 44 52 71 88 104 121 142 143 169 242 284 286 338 484 568 572 676 781 923 968 1144 1352 1562 1573 1846 1859 2657 3124 3146 3692 3718 5314 6248 6292 7384 7436 8591 10153 10628 11999 12584 14872 17182 20306 20449 21256 23998 29227 34364 34541 40612 40898 47996 58454 68728 69082 81224 81796 95992 111683 116908 131989 138164 163592 188647 223366 233816 263978 276328 321497 377294 379951 446732 449033 527956 642994 754588 759902 893464 898066 1055912 1285988 1451879 1509176 1519804 1796132 2075117 2452411 2571976 2903758 3039608 3592264 4150234 4179461 4904822 4939363 5807516 7059649 8300468 8358922 9809644 9878726 11615032 14119298 16600936 16717844 19619288 19757452 22826287 26976521 28238596 31881343 33435688 39514904 45652574 53953042 54332993 56477192 63762686 77656139 91305148 91775437 107906084 108665986 127525372 155312278 182610296 183550874 215812168 217331972 255050744 296741731 310624556 350694773 367101748 434663944 501235079 593483462 621249112 701389546 734203496 854217529 1002470158 1009529807 1186966924 1193080681 1402779092 1708435058 2004940316 2019059614 2373933848 2386161362 2805558184 3416870116 3857642503 4009880632 4038119228 4772322724 5513585869 6516056027 6833740232 7715285006 8076238456 9544645448 11027171738 11104827877 13032112054 13123887491 15430570012 22054343476 22209655754 26064224108 26247774982 30861140024 44108686952 44419311508 52128448216 52495549964 60649444559 71676616297 84708728351 88838623016 104991099928 121298889118 143353232594 144362762401 169417456702 242597778236 286706465188 288725524802 338834913404 485195556472 573412930376 577451049604 677669826808 788442779267 931796011861 1154902099208 1576885558534 1863592023722 3153771117068 3727184047444 6307542234136 7454368094888 10249756130471 20499512260942 40999024521884 81998049043768
• Sum of all divisors σ(n): 185640649278840
• Sum of proper divisors (its aliquot sum) s(n): 103642600235072
• 81998049043768 is an abundant number, because the sum of its proper divisors (103642600235072) is greater than itself. Its abundance is 21644551191304

Bases of 81998049043768

• Binary: 10010101001001110101000100101011110010100111000₂
• Hexadecimal: 0x4A93A895E538
• Base-36: T2DDT9UT4

Squares and roots of 81998049043768

• 81998049043768 squared (81998049043768²) is 6723680046984182219179637824
• 81998049043768 cubed (81998049043768³) is 551328646247213304129624369463659764280832
• The square root of 81998049043768 is 9055277.4139596629
• The cube root of 81998049043768 is 43444.4703064483

Scales and comparisons

• 81,998,049,043,768 seconds is equal to 2,607,284 years, 16 weeks, 5 days, 13 hours, 29 minutes, 28 seconds.
• To count from 1 to 81,998,049,043,768 would take you about six million, five hundred eighteen thousand, two hundred ten 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 81998049043768 cubic inches would be around 3620.4 feet tall.

Recreational maths with 81998049043768

• 81998049043768 backwards is 86734094089918
• The number of decimal digits it has is: 14
• The sum of 81998049043768's digits is 76
• More coming soon!