81442405904

Names of 81442405904

• Cardinal: 81442405904 can be written as Eighty-one billion, four hundred forty-two million, four hundred five thousand, nine hundred four.

Scientific notation

• Scientific notation: 8.1442405904 × 10¹⁰

Factors of 81442405904

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 243

Divisors of 81442405904

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 4 8 16 19 31 38 41 53 62 76 82 97 106 124 152 164 194 212 248 304 328 388 424 496 589 656 776 779 848 1007 1178 1271 1552 1558 1643 1681 1843 2014 2173 2356 2542 3007 3116 3286 3362 3686 3977 4028 4346 4712 5084 5141 6014 6232 6572 6724 7372 7954 8056 8692 9424 10168 10282 12028 12464 13144 13448 14744 15908 16112 17384 20336 20564 24056 24149 26288 26896 29488 31217 31816 31939 34768 41128 41287 48112 48298 52111 57133 62434 63632 63878 67363 75563 82256 82574 89093 96596 97679 104222 114266 123287 124868 127756 134726 151126 159371 163057 165148 178186 193192 195358 208444 210781 228532 246574 249736 255512 269452 302252 318742 326114 330296 356372 386384 390716 416888 421562 457064 493148 499472 511024 538904 604504 637484 652228 660592 712744 781432 833776 843124 914128 986296 990109 1077808 1209008 1274968 1279897 1304456 1425488 1562864 1686248 1692767 1972592 1980218 2342453 2549936 2559794 2608912 2761883 3028049 3098083 3372496 3385534 3960436 4004839 4684906 5054767 5119588 5523766 6056098 6196166 6534211 6771068 7920872 8009678 8642021 9369812 10109534 10239176 11047532 12112196 12392332 13068422 13542136 15841744 16019356 17284042 18739624 20219068 20478352 22095064 24224392 24784664 26136844 27084272 32038712 34568084 37479248 40438136 44190128 48448784 49569328 52273688 52475777 64077424 69136168 80876272 96040573 104547376 104951554 124150009 138272336 164198399 192081146 209903108 248300018 267902651 328396798 384162292 419806216 496600036 535805302 656793596 768324584 839612432 993200072 1071610604 1313587192 1536649168 1986400144 2143221208 2627174384 4286442416 5090150369 10180300738 20360601476 40721202952 81442405904
• Sum of all divisors σ(n): 180903421440
• Sum of proper divisors (its aliquot sum) s(n): 99461015536
• 81442405904 is an abundant number, because the sum of its proper divisors (99461015536) is greater than itself. Its abundance is 18018609632

Bases of 81442405904

• Binary: 1001011110110010110000111111000010000₂
• Hexadecimal: 0x12F6587E10
• Base-36: 11EWPEKW

Squares and roots of 81442405904

• 81442405904 squared (81442405904²) is 6632865479431894057216
• 81442405904 cubed (81442405904³) is 540196522682521879131310872203264
• The square root of 81442405904 is 285381.1589856625
• The cube root of 81442405904 is 4334.6116934555

Scales and comparisons

• 81,442,405,904 seconds is equal to 2,589 years, 32 weeks, 10 hours, 31 minutes, 44 seconds.
• To count from 1 to 81,442,405,904 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 81442405904 cubic inches would be around 361.2 feet tall.

Recreational maths with 81442405904

• 81442405904 backwards is 40950424418
• 81442405904 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81442405904's digits is 41
• More coming soon!