81572121792

Names of 81572121792

• Cardinal: 81572121792 can be written as Eighty-one billion, five hundred seventy-two million, one hundred twenty-one thousand, seven hundred ninety-two.

Scientific notation

• Scientific notation: 8.1572121792 × 10¹⁰

Factors of 81572121792

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 493

Divisors of 81572121792

• Number of divisors d(n): 672
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 19 21 24 27 28 32 36 38 42 48 54 56 57 63 64 72 76 81 84 96 108 112 113 114 126 133 144 152 162 168 171 189 192 216 224 226 228 243 252 266 288 304 324 336 339 342 349 378 399 432 448 452 456 486 504 513 532 567 576 608 648 672 678 684 698 756 791 798 864 904 912 972 1008 1017 1026 1047 1064 1134 1197 1216 1296 1344 1356 1368 1396 1512 1539 1582 1596 1701 1728 1808 1824 1944 2016 2034 2052 2094 2128 2147 2268 2373 2394 2443 2592 2712 2736 2792 3024 3051 3078 3141 3164 3192 3402 3591 3616 3648 3888 4032 4068 4104 4188 4256 4294 4536 4617 4746 4788 4886 5184 5424 5472 5584 6048 6102 6156 6282 6328 6384 6441 6631 6804 7119 7182 7232 7329 7776 8136 8208 8376 8512 8588 9072 9153 9234 9423 9492 9576 9772 10773 10848 10944 11168 12096 12204 12312 12564 12656 12768 12882 13262 13608 14238 14364 14658 15029 15552 16272 16416 16752 17176 18144 18306 18468 18846 18984 19152 19323 19544 19893 21357 21546 21696 21987 22336 24408 24624 25128 25312 25536 25764 26524 27216 27459 28269 28476 28728 29316 30058 32319 32544 32832 33504 34352 36288 36612 36936 37692 37968 38304 38646 39088 39437 39786 42714 43092 43974 45087 46417 48816 49248 50256 50624 51528 53048 54432 54918 56538 56952 57456 57969 58632 59679 60116 64071 64638 65088 65961 67008 68704 73224 73872 75384 75936 76608 77292 78176 78874 79572 84807 85428 86184 87948 90174 92834 97632 98496 100512 103056 106096 108864 109836 113076 113904 114912 115938 117264 118311 119358 120232 128142 129276 131922 135261 137408 139251 146448 147744 150768 151872 154584 156352 157748 159144 169614 170856 172368 173907 175896 179037 180348 185668 192213 195264 197883 201024 206112 212192 219672 226152 227808 229824 231876 234528 236622 238716 240464 256284 258552 263844 270522 276059 278502 292896 295488 301536 309168 315496 318288 339228 341712 344736 347814 351792 354933 358074 360696 371336 384426 395766 405783 412224 417753 424384 439344 452304 455616 463752 469056 473244 477432 480928 512568 517104 521721 527688 537111 541044 552118 557004 585792 593649 603072 618336 630992 636576 678456 683424 689472 695628 703584 709866 716148 721392 742672 749303 768852 791532 811566 828177 835506 878688 904608 927504 946488 954864 961856 1025136 1034208 1043442 1055376 1064799 1074222 1082088 1104236 1114008 1187298 1217349 1236672 1253259 1261984 1273152 1356912 1366848 1391256 1407168 1419732 1432296 1442784 1485344 1498606 1537704 1583064 1611333 1623132 1656354 1671012 1757376 1809216 1855008 1892976 1909728 2050272 2068416 2086884 2110752 2129598 2148444 2164176 2208472 2228016 2247909 2374596 2434698 2484531 2506518 2523968 2713824 2782512 2839464 2864592 2885568 2970688 2997212 3075408 3166128 3194397 3222666 3246264 3312708 3342024 3652047 3710016 3759777 3785952 3819456 4100544 4173768 4221504 4259196 4296888 4328352 4416944 4456032 4495818 4749192 4869396 4969062 5013036 5245121 5427648 5565024 5678928 5729184 5994424 6150816 6332256 6388794 6445332 6492528 6625416 6684048 6743727 7304094 7453593 7519554 7571904 8347536 8518392 8593776 8656704 8833888 8912064 8991636 9498384 9583191 9738792 9938124 10026072 10490242 11130048 11279331 11357856 11458368 11988848 12301632 12664512 12777588 12890664 12985056 13250832 13368096 13487454 14608188 14907186 15039108 15735363 16695072 17036784 17187552 17667776 17983272 18996768 19166382 19477584 19876248 20052144 20231181 20980484 22360779 22558662 22715712 23977696 25555176 25781328 25970112 26501664 26736192 26974908 29216376 29814372 30078216 31470726 33390144 34073568 34375104 35966544 37993536 38332764 38955168 39752496 40104288 40462362 41960968 44721558 45117324 47206089 47955392 51110352 51562656 53003328 53949816 58432752 59628744 60156432 60693543 62941452 67082337 68147136 71933088 76665528 77910336 79504992 80208576 80924724 83921936 89443116 90234648 94412178 102220704 103125312 107899632 116865504 119257488 120312864 121387086 125882904 134164674 141618267 143866176 153331056 159009984 161849448 167843872 178886232 180469296 182080629 188824356 204441408 215799264 233731008 238514976 240625728 242774172 251765808 268329348 283236534 306662112 323698896 335687744 357772464 360938592 364161258 377648712 424854801 431598528 477029952 485548344 503531616 536658696 566473068 613324224 647397792 715544928 721877184 728322516 755297424 849709602 971096688 1007063232 1073317392 1132946136 1274564403 1294795584 1431089856 1456645032 1510594848 1699419204 1942193376 2146634784 2265892272 2549128806 2913290064 3021189696 3398838408 3884386752 4293269568 4531784544 5098257612 5826580128 6797676816 9063569088 10196515224 11653160256 13595353632 20393030448 27190707264 40786060896 81572121792
• Sum of all divisors σ(n): 295119552000
• Sum of proper divisors (its aliquot sum) s(n): 213547430208
• 81572121792 is an abundant number, because the sum of its proper divisors (213547430208) is greater than itself. Its abundance is 131975308416

Bases of 81572121792

• Binary: 1001011111110000100111100110011000000₂
• Hexadecimal: 0x12FE13CCC0
• Base-36: 11H1XO00

Squares and roots of 81572121792

• 81572121792 squared (81572121792²) is 6654011053648881291264
• 81572121792 cubed (81572121792³) is 542781800073560790695537233625088
• The square root of 81572121792 is 285608.3363489239
• The cube root of 81572121792 is 4336.9117636649

Scales and comparisons

• 81,572,121,792 seconds is equal to 2,593 years, 38 weeks, 3 days, 18 hours, 43 minutes, 12 seconds.
• To count from 1 to 81,572,121,792 would take you about five thousand, one hundred eighty-seven 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 81572121792 cubic inches would be around 361.4 feet tall.

Recreational maths with 81572121792

• 81572121792 backwards is 29712127518
• The number of decimal digits it has is: 11
• The sum of 81572121792's digits is 45
• More coming soon!