644138449920

Names of 644138449920

• Cardinal: 644138449920 can be written as Six hundred forty-four billion, one hundred thirty-eight million, four hundred forty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 6.4413844992 × 10¹¹

Factors of 644138449920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 1820

Divisors of 644138449920

• Number of divisors d(n): 1056
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 19 20 21 24 28 30 32 35 36 38 40 42 45 48 56 57 60 61 63 64 70 72 76 80 84 90 95 96 105 112 114 120 122 126 128 133 140 144 152 160 168 171 180 183 190 192 210 224 228 240 244 252 256 266 280 285 288 304 305 315 320 336 342 360 366 380 384 399 420 427 448 456 480 488 504 512 532 549 560 570 576 608 610 630 640 665 672 684 720 732 760 768 798 840 854 855 896 912 915 960 976 1008 1024 1064 1098 1120 1140 1152 1159 1197 1216 1220 1260 1280 1281 1330 1344 1368 1440 1464 1520 1536 1596 1680 1708 1710 1723 1792 1824 1830 1920 1952 1995 2016 2128 2135 2196 2240 2280 2304 2318 2394 2432 2440 2520 2560 2562 2660 2688 2736 2745 2880 2928 3040 3072 3192 3360 3416 3420 3446 3477 3584 3648 3660 3840 3843 3904 3990 4032 4256 4270 4392 4480 4560 4608 4636 4788 4864 4880 5040 5120 5124 5169 5320 5376 5472 5490 5760 5795 5856 5985 6080 6384 6405 6720 6832 6840 6892 6954 7168 7296 7320 7680 7686 7808 7980 8064 8113 8512 8540 8615 8784 8960 9120 9216 9272 9576 9728 9760 10080 10248 10338 10431 10640 10752 10944 10980 11520 11590 11712 11970 12061 12160 12768 12810 13440 13664 13680 13784 13908 14592 14640 15360 15372 15507 15616 15960 16128 16226 17024 17080 17230 17385 17568 17920 18240 18544 19152 19215 19456 19520 20160 20496 20676 20862 21280 21504 21888 21960 23040 23180 23424 23940 24122 24320 24339 25536 25620 25845 26880 27328 27360 27568 27816 29184 29280 30744 31014 31232 31920 32256 32452 32737 34048 34160 34460 34770 35136 35840 36183 36480 37088 38304 38430 39040 40320 40565 40992 41352 41724 42560 43776 43920 46080 46360 46848 47880 48244 48640 48678 51072 51240 51690 52155 53760 54656 54720 55136 55632 58368 58560 60305 61488 62028 62464 63840 64512 64904 65474 68096 68320 68920 69540 70272 72366 72960 73017 74176 76608 76860 77535 78080 80640 81130 81984 82704 83448 85120 87552 87840 92720 93696 95760 96488 97280 97356 98211 102144 102480 103380 104310 105103 107520 108549 109312 109440 110272 111264 117120 120610 121695 122976 124056 127680 129808 130948 136192 136640 137840 139080 140544 144732 145920 146034 148352 153216 153720 155070 156160 161280 162260 163685 163968 165408 166896 170240 175104 175680 180915 185440 187392 191520 192976 194712 196422 204288 204960 206760 208620 210206 217098 218624 218880 220544 222528 229159 234240 241220 243390 245952 248112 255360 259616 261896 273280 275680 278160 281088 289464 291840 292068 294633 296704 306432 307440 310140 312320 315309 322560 324520 327370 327936 330816 333792 340480 351360 361830 365085 370880 383040 385952 389424 392844 408576 409920 413520 417240 420412 434196 437248 437760 441088 445056 458318 468480 482440 486780 491055 491904 496224 510720 519232 523792 525515 542745 546560 551360 556320 562176 578928 584136 589266 593408 612864 614880 620280 630618 649040 654740 655872 661632 667584 680960 687477 702720 723660 730170 735721 741760 766080 771904 778848 785688 819840 827040 834480 840824 868392 875520 882176 890112 916636 936960 945927 964880 973560 982110 983808 992448 1021440 1038464 1047584 1051030 1085490 1093120 1102720 1112640 1145795 1157856 1168272 1178532 1186816 1225728 1229760 1240560 1261236 1298080 1309480 1311744 1323264 1335168 1374954 1405440 1447320 1460340 1471442 1473165 1483520 1532160 1543808 1557696 1571376 1576545 1639680 1654080 1668960 1681648 1736784 1764352 1780224 1833272 1891854 1929760 1947120 1964220 1967616 1984896 1996957 2042880 2062431 2076928 2095168 2102060 2170980 2186240 2205440 2207163 2225280 2291590 2315712 2336544 2357064 2459520 2481120 2522472 2596160 2618960 2646528 2670336 2749908 2810880 2894640 2920680 2942884 2946330 2967040 3064320 3087616 3115392 3142752 3153090 3279360 3308160 3337920 3363296 3437385 3473568 3560448 3666544 3678605 3783708 3859520 3894240 3928440 3935232 3969792 3993914 4124862 4153856 4190336 4204120 4341960 4410880 4414326 4450560 4583180 4631424 4673088 4714128 4729635 4919040 4962240 5044944 5192320 5237920 5293056 5340672 5499816 5789280 5841360 5885768 5892660 5934080 5990871 6128640 6175232 6230784 6285504 6306180 6558720 6616320 6621489 6675840 6726592 6874770 6947136 7333088 7357210 7567416 7719040 7788480 7856880 7939584 7987828 8249724 8307712 8380672 8408240 8683920 8821760 8828652 8901120 9166360 9262848 9346176 9428256 9459270 9838080 9924480 9984785 10089888 10312155 10384640 10475840 10681344 10999632 11035815 11578560 11682720 11771536 11785320 11981742 12350464 12461568 12571008 12612360 13232640 13242978 13351680 13453184 13749540 13894272 13978699 14666176 14714420 15134832 15438080 15576960 15713760 15879168 15975656 16499448 16761344 16816480 17367840 17657304 17802240 17972613 18332720 18525696 18692352 18856512 18918540 19676160 19848960 19969570 20179776 20624310 20769280 20951680 21999264 22071630 23157120 23365440 23543072 23570640 23963484 24923136 25142016 25224720 26465280 26485956 26703360 26906368 27499080 27788544 27957398 29332352 29428840 29954355 30269664 30876160 31153920 31427520 31951312 32998896 33107445 33522688 33632960 34735680 35314608 35945226 36665440 37051392 37384704 37713024 37837080 39697920 39939140 40359552 41248620 41538560 41903360 41936097 43998528 44143260 46314240 46730880 47086144 47141280 47926968 50284032 50449440 52971912 53406720 53812736 54998160 55577088 55914796 58664704 58857680 59908710 60539328 61752320 62307840 62855040 63902624 65997792 66214890 67265920 69471360 69893495 70629216 71890452 73330880 74769408 75426048 75674160 79395840 79878280 80719104 82497240 83806720 83872194 87997056 88286520 89863065 92628480 93461760 94172288 94282560 95853936 100568064 100898880 105943824 107625472 109996320 111154176 111829592 117329408 117715360 119817420 121078656 124615680 125710080 125808291 127805248 131995584 132429780 134531840 138942720 139786990 141258432 143780904 146661760 150852096 151348320 159756560 161438208 164994480 167613440 167744388 175994112 176573040 179726130 185256960 186923520 188344576 188565120 191707872 201797760 209680485 211887648 219992640 223659184 234658816 235430720 239634840 242157312 251420160 251616582 255610496 263991168 264859560 269063680 277885440 279573980 282516864 287561808 293323520 301704192 302696640 319513120 322876416 329988960 335488776 351988224 353146080 359452260 373847040 376689152 377130240 383415744 403595520 419360970 423775296 439985280 447318368 470861440 479269680 484314624 502840320 503233164 511220992 527982336 529719120 538127360 555770880 559147960 565033728 575123616 586647040 605393280 629041455 639026240 659977920 670977552 703976448 706292160 718904520 753378304 754260480 766831488 807191040 838721940 847550592 879970560 894636736 941722880 958539360 968629248 1006466328 1022441984 1055964672 1059438240 1118295920 1130067456 1150247232 1173294080 1210786560 1258082910 1278052480 1319955840 1341955104 1412584320 1437809040 1508520960 1533662976 1614382080 1677443880 1695101184 1759941120 1789273472 1883445760 1917078720 2012932656 2044883968 2111929344 2118876480 2236591840 2260134912 2300494464 2421573120 2516165820 2556104960 2639911680 2683910208 2825168640 2875618080 3067325952 3354887760 3390202368 3519882240 3578546944 3766891520 3834157440 4025865312 4237752960 4473183680 4600988928 4843146240 5032331640 5112209920 5279823360 5367820416 5650337280 5751236160 6134651904 6709775520 6780404736 7157093888 7668314880 8051730624 8475505920 8946367360 9201977856 10064663280 10224419840 10559646720 10735640832 11300674560 11502472320 13419551040 14314187776 15336629760 16103461248 16951011840 17892734720 18403955712 20129326560 21471281664 23004944640 26839102080 30673259520 32206922496 33902023680 35785469440 40258653120 42942563328 46009889280 53678204160 64413844992 71570938880 80517306240 92019778560 107356408320 128827689984 161034612480 214712816640 322069224960 644138449920
• Sum of all divisors σ(n): 2730620705280
• Sum of proper divisors (its aliquot sum) s(n): 2086482255360
• 644138449920 is an abundant number, because the sum of its proper divisors (2086482255360) is greater than itself. Its abundance is 1442343805440

Bases of 644138449920

• Binary: 1001010111111001101001001011110000000000₂
• Hexadecimal: 0x95F9A4BC00
• Base-36: 87WVEGW0

Squares and roots of 644138449920

• 644138449920 squared (644138449920²) is 414914342665340348006400
• 644138449920 cubed (644138449920³) is 267262281534028053074075858239488000
• The square root of 644138449920 is 802582.3633247867
• The cube root of 644138449920 is 8636.2739077173

Scales and comparisons

• 644,138,449,920 seconds is equal to 20,481 years, 31 weeks, 5 days, 3 hours, 12 minutes.
• To count from 1 to 644,138,449,920 would take you about forty thousand, nine hundred sixty-three 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 644138449920 cubic inches would be around 719.7 feet tall.

Recreational maths with 644138449920

• 644138449920 backwards is 029944831446
• The number of decimal digits it has is: 12
• The sum of 644138449920's digits is 54
• More coming soon!