81980065440

Names of 81980065440

• Cardinal: 81980065440 can be written as Eighty-one billion, nine hundred eighty million, sixty-five thousand, four hundred forty.

Scientific notation

• Scientific notation: 8.198006544 × 10¹⁰

Factors of 81980065440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 61

Divisors of 81980065440

• Number of divisors d(n): 1152
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 18 20 21 24 26 27 28 30 31 32 35 36 39 40 42 45 48 49 52 54 56 60 62 63 65 70 72 78 80 84 90 91 93 96 98 104 105 108 112 117 120 124 126 130 135 140 144 147 155 156 160 168 180 182 186 189 195 196 208 210 216 217 224 234 240 245 248 252 260 270 273 279 280 288 294 310 312 315 336 351 360 364 372 378 390 392 403 416 420 432 434 441 455 465 468 480 490 496 504 520 540 546 558 560 585 588 620 624 630 637 651 672 702 720 728 735 744 756 780 784 806 819 837 840 864 868 882 910 930 936 945 961 980 992 1008 1040 1080 1085 1092 1116 1120 1170 1176 1209 1240 1248 1260 1274 1302 1323 1365 1395 1404 1440 1456 1470 1488 1512 1519 1560 1568 1612 1638 1674 1680 1736 1755 1764 1820 1860 1872 1890 1911 1922 1953 1960 2015 2016 2080 2160 2170 2184 2205 2232 2340 2352 2418 2457 2480 2520 2548 2604 2646 2730 2790 2808 2821 2883 2912 2940 2976 3024 3038 3120 3185 3224 3255 3276 3348 3360 3472 3510 3528 3627 3640 3720 3744 3780 3822 3844 3906 3920 4030 4095 4185 4320 4340 4368 4410 4464 4557 4680 4704 4805 4836 4914 4960 5040 5096 5208 5292 5460 5580 5616 5642 5733 5766 5859 5880 6045 6048 6076 6240 6370 6448 6510 6552 6615 6696 6727 6944 7020 7056 7254 7280 7440 7560 7595 7644 7688 7812 7840 8060 8190 8370 8463 8649 8680 8736 8820 8928 9114 9360 9555 9610 9672 9765 9828 10080 10192 10416 10584 10881 10920 11160 11232 11284 11466 11532 11718 11760 12090 12152 12285 12493 12740 12896 13020 13104 13230 13392 13454 13671 14040 14105 14112 14415 14508 14560 14880 15120 15190 15288 15376 15624 16120 16380 16740 16926 17199 17298 17360 17640 18135 18228 18720 19110 19220 19344 19530 19656 19747 20181 20384 20832 21168 21762 21840 22320 22568 22785 22932 23064 23436 23520 24180 24304 24570 24986 25389 25480 25947 26040 26208 26460 26784 26908 27342 28080 28210 28665 28830 29016 29295 29791 30240 30380 30576 30752 31248 32240 32760 33480 33635 33852 34398 34596 34720 35280 36270 36456 37479 38220 38440 38688 39060 39312 39494 40362 41013 42315 42336 43245 43524 43680 44640 45136 45570 45864 46128 46872 47089 48360 48608 49140 49972 50778 50960 51894 52080 52920 53816 54405 54684 56160 56420 57330 57660 58032 58590 59241 59582 60543 60760 61152 62465 62496 64480 65520 66960 67270 67704 68355 68796 69192 70560 72540 72912 74958 76167 76440 76880 78120 78624 78988 80724 82026 84630 85995 86490 87048 87451 89373 90272 91140 91728 92256 93744 94178 96720 98280 98735 99944 100905 101556 101920 103788 104160 105840 107632 108810 109368 112437 112840 114660 115320 116064 117180 118482 119164 121086 121520 124930 126945 129735 131040 133920 134540 135408 136710 137592 138384 141267 145080 145824 148955 149916 152334 152880 153760 156240 157976 161448 164052 169260 171990 172980 174096 174902 177723 178746 181629 182280 183456 187395 187488 188356 193440 196560 197470 199888 201810 203112 205065 207576 208537 211680 215264 217620 218736 224874 225680 229320 230640 234360 235445 236964 238328 242172 243040 249860 253890 259470 262353 268119 269080 270816 273420 275184 276768 282534 290160 296205 297910 299832 302715 304668 305760 312480 315952 322896 328104 337311 338520 343980 345960 348192 349804 355446 357492 363258 364560 374790 376712 380835 387283 393120 394940 399776 403620 406224 410130 415152 417074 423801 435240 437255 437472 446865 449748 451360 458640 461280 468720 470890 473928 476656 484344 499720 507780 518940 524706 533169 536238 538160 546840 550368 562185 565068 580320 592410 595820 599664 605430 609336 612157 625611 631904 645792 656208 674622 677040 687960 691920 699608 706335 710892 714984 726516 729120 749580 753424 761670 774566 787059 789880 804357 807240 812448 820260 830304 834148 847602 870480 874510 888615 893730 899496 908145 917280 937440 941780 947856 953312 968688 999440 1015560 1037880 1042685 1049412 1066338 1072476 1076320 1093680 1124370 1130136 1161849 1184820 1191640 1199328 1210860 1218672 1224314 1251222 1271403 1311765 1312416 1340595 1349244 1354080 1375920 1383840 1399216 1412670 1421784 1429968 1453032 1459759 1499160 1506848 1523340 1549132 1574118 1579760 1608714 1614480 1640520 1668296 1686555 1695204 1740960 1749020 1777230 1787460 1798992 1816290 1836471 1876833 1883560 1895712 1936415 1937376 1998880 2031120 2075760 2085370 2098824 2119005 2132676 2144952 2187360 2248740 2260272 2323698 2361177 2369640 2383280 2421720 2437344 2448628 2502444 2542806 2623530 2665845 2681190 2698488 2710981 2751840 2798432 2825340 2843568 2859936 2906064 2919518 2998320 3046680 3060785 3098264 3128055 3148236 3159520 3217428 3228960 3281040 3336592 3373110 3390408 3485547 3498040 3554460 3574920 3597984 3632580 3672942 3753666 3767120 3872830 3935295 4021785 4062240 4151520 4170740 4197648 4238010 4265352 4289904 4379277 4497480 4520544 4647396 4722354 4739280 4766560 4843440 4897256 5004888 5085612 5247060 5331690 5362380 5396976 5421962 5509413 5630499 5650680 5687136 5809245 5812128 5839036 5996640 6093360 6121570 6196528 6256110 6296472 6357015 6434856 6562080 6673184 6746220 6780816 6971094 6996080 7108920 7149840 7265160 7298795 7345884 7507332 7534240 7745660 7870590 8043570 8132943 8341480 8395296 8476020 8530704 8579808 8758554 8994960 9182355 9294792 9384165 9444708 9478560 9686880 9794512 10009776 10171224 10456641 10494120 10663380 10724760 10793952 10843924 11018826 11260998 11301360 11618490 11678072 11805885 12186720 12243140 12393056 12512220 12592944 12714030 12869712 13137831 13492440 13554905 13561632 13942188 13992160 14217840 14299680 14530320 14597590 14691768 15014664 15491320 15741180 16087140 16265886 16528239 16682960 16952040 17061408 17427735 17517108 17989920 18364710 18589584 18768330 18889416 18976867 19589024 20019552 20342448 20913282 20988240 21326760 21449520 21687848 21896385 22037652 22521996 22602720 23236980 23356144 23611770 24398829 24486280 25024440 25185888 25428060 25739424 26275662 26984880 27109810 27547065 27884376 28152495 28435680 29060640 29195180 29383536 30029328 30982640 31482360 32174280 32531772 33056478 33365920 33904080 34855470 35034216 36729420 37179168 37536660 37778832 37953734 39413493 40664715 40684896 41826564 41976480 42653520 42899040 43375696 43792770 44075304 45043992 46473960 46712288 47223540 48797658 48972560 50048880 50856120 52283205 52551324 53969760 54219620 55094130 55768752 56304990 56930601 58390360 58767072 60058656 61965280 62964720 64348560 65063544 65689155 66112956 67808160 69710940 70068432 73196487 73458840 75073320 75557664 75907468 78826986 81329430 82641195 83653128 85307040 86751392 87585540 88150608 90087984 92947920 94447080 94884335 97595316 97945120 100097760 101712240 104566410 105102648 108439240 110188260 111537504 112609980 113861202 116780720 121994145 125929440 128697120 130127088 131378310 132225912 139421880 140136864 146392974 146917680 150146640 151814936 157653972 162658860 165282390 167306256 170791803 175171080 176301216 180175968 185895840 188894160 189768670 195190632 197067465 203424480 209132820 210205296 216878480 220376520 225219960 227722404 233561440 243988290 260254176 262756620 264451824 278843760 284653005 292785948 293835360 300293280 303629872 315307944 325317720 330564780 334612512 341583606 350342160 365982435 377788320 379537340 390381264 394134930 418265640 420410592 433756960 440753040 450439920 455444808 487976580 512375409 525513240 528903648 557687520 569306010 585571896 607259744 630615888 650635440 661129560 683167212 700684320 731964870 759074680 780762528 788269860 836531280 853959015 881506080 900879840 910889616 975953160 1024750818 1051026480 1138612020 1171143792 1261231776 1301270880 1322259120 1366334424 1463929740 1518149360 1576539720 1673062560 1707918030 1821779232 1951906320 2049501636 2102052960 2277224040 2342287584 2561877045 2644518240 2732668848 2927859480 3036298720 3153079440 3415836060 3903812640 4099003272 4554448080 5123754090 5465337696 5855718960 6306158880 6831672120 8198006544 9108896160 10247508180 11711437920 13663344240 16396013088 20495016360 27326688480 40990032720 81980065440
• Sum of all divisors σ(n): 371432355840
• Sum of proper divisors (its aliquot sum) s(n): 289452290400
• 81980065440 is an abundant number, because the sum of its proper divisors (289452290400) is greater than itself. Its abundance is 207472224960

Bases of 81980065440

• Binary: 1001100010110011001001000011010100000₂
• Hexadecimal: 0x13166486A0
• Base-36: 11NSTBC0

Squares and roots of 81980065440

• 81980065440 squared (81980065440²) is 6720731129546682393600
• 81980065440 cubed (81980065440³) is 550965977804882140162223837184000
• The square root of 81980065440 is 286321.6118982289
• The cube root of 81980065440 is 4344.1294030619

Scales and comparisons

• 81,980,065,440 seconds is equal to 2,606 years, 37 weeks, 8 hours, 24 minutes.
• To count from 1 to 81,980,065,440 would take you about five thousand, two hundred thirteen 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 81980065440 cubic inches would be around 362 feet tall.

Recreational maths with 81980065440

• 81980065440 backwards is 04456008918
• 81980065440 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81980065440's digits is 45
• More coming soon!