81684199168

Names of 81684199168

• Cardinal: 81684199168 can be written as Eighty-one billion, six hundred eighty-four million, one hundred ninety-nine thousand, one hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1684199168 × 10¹⁰

Factors of 81684199168

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 726

Divisors of 81684199168

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 8 11 13 16 22 26 32 44 52 59 64 88 104 118 128 143 176 208 236 256 286 352 416 472 572 641 649 704 767 832 944 1144 1282 1298 1408 1534 1664 1888 2288 2564 2596 2816 3068 3328 3481 3776 4576 5128 5192 6136 6962 7051 7552 8333 8437 9152 10256 10384 12272 13924 14102 15104 16666 16874 18304 20512 20768 24544 27848 28204 33332 33748 36608 37819 38291 41024 41536 45253 49088 55696 56408 66664 67496 75638 76582 82048 83072 90506 91663 98176 111392 112816 133328 134992 151276 153164 164096 166144 181012 183326 196352 222784 225632 266656 269984 302552 306328 362024 366652 416009 445568 451264 491647 497783 533312 539968 605104 612656 724048 733304 832018 891136 902528 983294 995566 1066624 1079936 1210208 1225312 1448096 1466608 1664036 1805056 1966588 1991132 2133248 2159872 2231321 2420416 2450624 2896192 2933216 3328072 3933176 3982264 4462642 4840832 4901248 5408117 5792384 5866432 6656144 7866352 7964528 8925284 9681664 9802496 10816234 11584768 11732864 13312288 15732704 15929056 17850568 21632468 23465728 24544531 26624576 29007173 31465408 31858112 35701136 43264936 49089062 53249152 58014346 62930816 63716224 71402272 86529872 98178124 106498304 116028692 125861632 127432448 142804544 173059744 196356248 232057384 285609088 319078903 346119488 392712496 464114768 571218176 638157806 692238976 785424992 928229536 1276315612 1384477952 1570849984 1856459072 2552631224 3141699968 3712918144 5105262448 6283399936 7425836288 10210524896 20421049792 40842099584 81684199168
• Sum of all divisors σ(n): 195160147056
• Sum of proper divisors (its aliquot sum) s(n): 113475947888
• 81684199168 is an abundant number, because the sum of its proper divisors (113475947888) is greater than itself. Its abundance is 31791748720

Bases of 81684199168

• Binary: 1001100000100110000011111011100000000₂
• Hexadecimal: 0x1304C1F700
• Base-36: 11IWNVGG

Squares and roots of 81684199168

• 81684199168 squared (81684199168²) is 6672308393717491892224
• 81684199168 cubed (81684199168³) is 545022167742737767649850406469632
• The square root of 81684199168 is 285804.4771657713
• The cube root of 81684199168 is 4338.8971120699

Scales and comparisons

• 81,684,199,168 seconds is equal to 2,597 years, 15 weeks, 5 days, 23 hours, 19 minutes, 28 seconds.
• To count from 1 to 81,684,199,168 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 81684199168 cubic inches would be around 361.6 feet tall.

Recreational maths with 81684199168

• 81684199168 backwards is 86199148618
• The number of decimal digits it has is: 11
• The sum of 81684199168's digits is 61
• More coming soon!