81128912513472

Names of 81128912513472

• Cardinal: 81128912513472 can be written as Eighty-one trillion, one hundred twenty-eight billion, nine hundred twelve million, five hundred thirteen thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 8.1128912513472 × 10¹³

Factors of 81128912513472

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 312

Divisors of 81128912513472

• Number of divisors d(n): 756
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 61 64 72 81 96 97 108 122 144 149 162 183 192 194 216 243 244 288 291 298 324 366 388 432 447 486 488 549 576 582 596 648 732 776 864 873 894 972 976 1098 1164 1192 1296 1341 1464 1552 1647 1728 1746 1788 1944 1952 2196 2328 2384 2592 2619 2682 2928 3104 3294 3492 3576 3721 3888 3904 4023 4392 4656 4768 4941 5184 5238 5364 5856 5917 6208 6588 6984 7152 7442 7776 7857 8046 8784 9089 9312 9409 9536 9882 10476 10728 11163 11712 11834 12069 13176 13968 14304 14453 14823 14884 15552 15714 16092 17568 17751 18178 18624 18818 19764 20952 21456 22326 23571 23668 24138 26352 27267 27936 28227 28608 28906 29646 29768 31428 32184 33489 35136 35502 36207 36356 37636 39528 41904 42912 43359 44652 47142 47336 48276 52704 53253 54534 55872 56454 57812 59292 59536 62856 64368 66978 71004 72414 72712 75272 79056 81801 83808 84681 85824 86718 89304 94284 94672 96552 100467 105408 106506 109068 112908 115624 118584 119072 125712 128736 130077 133956 142008 144828 145424 150544 158112 159759 163602 167616 169362 173436 178608 188568 189344 193104 200934 213012 218136 225816 231248 237168 238144 245403 251424 254043 257472 260154 267912 284016 289656 290848 301088 301401 316224 319518 327204 338724 346872 357216 360937 377136 378688 386208 390231 401868 426024 436272 451632 462496 474336 479277 490806 502848 508086 520308 535824 554429 568032 573949 579312 581696 602176 602802 639036 654408 677448 693744 714432 721874 736209 754272 762129 772416 780462 803736 852048 872544 881633 903264 904203 924992 948672 958554 981612 1016172 1040616 1071648 1082811 1108858 1136064 1147898 1158624 1170693 1205604 1278072 1308816 1354896 1387488 1401941 1437831 1443748 1472418 1508544 1524258 1560924 1607472 1663287 1704096 1721847 1745088 1763266 1806528 1808406 1917108 1963224 2032344 2081232 2143296 2165622 2208627 2217716 2286387 2295796 2317248 2341386 2411208 2556144 2617632 2644899 2709792 2774976 2803882 2875662 2887496 2944836 3048516 3121848 3214944 3248433 3326574 3408192 3443694 3512079 3526532 3616812 3834216 3926448 4064688 4162464 4205823 4331244 4417254 4435432 4572774 4591592 4682772 4822416 4989861 5112288 5165541 5235264 5289798 5419584 5607764 5751324 5774992 5889672 6097032 6243696 6429888 6496866 6653148 6887388 7024158 7053064 7233624 7668432 7852896 7934697 8129376 8324928 8411646 8662488 8834508 8870864 9145548 9183184 9365544 9644832 9745299 9979722 10224576 10331082 10579596 11215528 11502648 11549984 11779344 12194064 12487392 12617469 12993732 13306296 13774776 14048316 14106128 14467248 14969583 15336864 15496623 15705792 15869394 16258752 16823292 17324976 17669016 17741728 18291096 18366368 18731088 19289664 19490598 19959444 20662164 21159192 22431056 23005296 23099968 23558688 23804091 24388128 24974784 25234938 25987464 26612592 27549552 28096632 28212256 28934496 29235897 29939166 30673728 30993246 31738788 33646584 34649952 35010889 35338032 35483456 36582192 36732736 37462176 37852407 38981196 39918888 41324328 42318384 44862112 44908749 46010592 46489869 47117376 47608182 48776256 50469876 51974928 53225184 53779613 55099104 56193264 56424512 57868992 58471794 59878332 61986492 63477576 67293168 69299904 70021778 70676064 71412273 73164384 74924352 75704814 77962392 79837776 82648656 84636768 85518401 87707691 89724224 89817498 92021184 92979738 95216364 100939752 103949856 105032667 106450368 107559226 110198208 112386528 113557221 116943588 119756664 123972984 126955152 134586336 134726247 139469607 140043556 141352128 142824546 146328768 151409628 155924784 159675552 161338839 165297312 169273536 171036802 175415382 179634996 185959476 190432728 201879504 207899712 210065334 214236819 215118452 224773056 227114442 233887176 239513328 247945968 253910304 256555203 269172672 269452494 278939214 280087112 285649092 302819256 311849568 315098001 319351104 322677678 330594624 340671663 342073604 350830764 359269992 371918952 380865456 403759008 420130668 428473638 430236904 454228884 467774352 479026656 484016517 495891936 507820608 513110406 538904988 557878428 560174224 571298184 605638512 623699136 630196002 645355356 681343326 684147208 701661528 718539984 743837904 761730912 769665609 807518016 840261336 856947276 860473808 908457768 935548704 945294003 958053312 968033034 991783872 1026220812 1077809976 1115756856 1120348448 1142596368 1211277024 1260392004 1290710712 1362686652 1368294416 1403323056 1437079968 1452049551 1487675808 1523461824 1539331218 1680522672 1713894552 1720947616 1816915536 1871097408 1890588006 1936066068 2052441624 2155619952 2231513712 2240696896 2285192736 2308996827 2422554048 2520784008 2581421424 2725373304 2736588832 2806646112 2835882009 2874159936 2904099102 2975351616 3078662436 3361045344 3427789104 3441895232 3633831072 3781176012 3872132136 4104883248 4311239904 4356148653 4463027424 4570385472 4617993654 5041568016 5162842848 5216622461 5450746608 5473177664 5613292224 5671764018 5808198204 6157324872 6722090688 6855578208 6926990481 7267662144 7562352024 7744264272 8209766496 8507646027 8622479808 8712297306 8926054848 9235987308 10083136032 10325685696 10433244922 10901493216 11343528036 11616396408 12314649744 13068445959 13711156416 13853980962 15124704048 15488528544 15649867383 16419532992 17015292054 17424594612 18471974616 20166272064 20780971443 20866489844 21802986432 22687056072 23232792816 24629299488 26136891918 27707961924 30249408096 30977057088 31299734766 34030584108 34849189224 36943949232 41561942886 41732979688 45374112144 46465585632 46949602149 49258598976 52273783836 55415923848 60498816192 62599469532 68061168216 69698378448 73887898464 83123885772 83465959376 90748224288 92931171264 93899204298 104547567672 110831847696 125198939064 136122336432 139396756896 140848806447 147775796928 166247771544 166931918752 181496448576 187798408596 209095135344 221663695392 250397878128 272244672864 278793513792 281697612894 332495543088 333863837504 375596817192 418190270688 422546419341 443327390784 500795756256 544489345728 563395225788 664991086176 751193634384 836380541376 845092838682 1001591512512 1126790451576 1267639258023 1329982172352 1502387268768 1690185677364 2253580903152 2535278516046 3004774537536 3380371354728 4507161806304 5070557032092 6760742709456 9014323612608 10141114064184 13521485418912 20282228128368 27042970837824 40564456256736 81128912513472
• Sum of all divisors σ(n): 249388371250200
• Sum of proper divisors (its aliquot sum) s(n): 168259458736728
• 81128912513472 is an abundant number, because the sum of its proper divisors (168259458736728) is greater than itself. Its abundance is 87130546223256

Bases of 81128912513472

• Binary: 10010011100100101001100000000101110100111000000₂
• Hexadecimal: 0x49C94C02E9C0
• Base-36: SRA3VTO00

Squares and roots of 81128912513472

• 81128912513472 squared (81128912513472²) is 6581900445618593668581494784
• 81128912513472 cubed (81128912513472³) is 533982425424973256914775783353472297730048
• The square root of 81128912513472 is 9007158.9590431901
• The cube root of 81128912513472 is 43290.4285253719

Scales and comparisons

• 81,128,912,513,472 seconds is equal to 2,579,648 years, 24 weeks, 2 days, 23 hours, 31 minutes, 12 seconds.
• To count from 1 to 81,128,912,513,472 would take you about six million, four hundred forty-nine thousand, one hundred twenty-one 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 81128912513472 cubic inches would be around 3607.5 feet tall.

Recreational maths with 81128912513472

• 81128912513472 backwards is 27431521982118
• 81128912513472 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81128912513472's digits is 54
• More coming soon!