375251104641613824
375,251,104,641,613,824 is an even composite number composed of six prime numbers multiplied together.
What does the number 375251104641613824 look like?
This visualization shows the relationship between its 6 prime factors (large circles) and 1920 divisors.
375251104641613824 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one thousand, nine hundred twenty divisors.
Prime factorization of 375251104641613824:
215 × 34 × 13 × 43 × 103 × 15672
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 13 × 43 × 103 × 1567 × 1567)See below for interesting mathematical facts about the number 375251104641613824 from the Numbermatics database.
Names of 375251104641613824
- Cardinal: 375251104641613824 can be written as Three hundred seventy-five quadrillion, two hundred fifty-one trillion, one hundred four billion, six hundred forty-one million, six hundred thirteen thousand, eight hundred twenty-four.
Scientific notation
- Scientific notation: 3.75251104641613824 × 1017
Factors of 375251104641613824
Divisors of 375251104641613824
- Number of divisors d(n): 1920
-
Complete list of divisors:
1 2 3 4 6 8 9 12 13 16 18 24 26 27 32 36 39 43 48 52 54 64 72 78 81 86 96 103 104 108 117 128 129 144 156 162 172 192 206 208 216 234 256 258 288 309 312 324 344 351 384 387 412 416 432 468 512 516 559 576 618 624 648 688 702 768 774 824 832 864 927 936 1024 1032 1053 1118 1152 1161 1236 1248 1296 1339 1376 1404 1536 1548 1567 1648 1664 1677 1728 1854 1872 2048 2064 2106 2236 2304 2322 2472 2496 2592 2678 2752 2781 2808 3072 3096 3134 3296 3328 3354 3456 3483 3708 3744 4017 4096 4128 4212 4429 4472 4608 4644 4701 4944 4992 5031 5184 5356 5504 5562 5616 6144 6192 6268 6592 6656 6708 6912 6966 7416 7488 8034 8192 8256 8343 8424 8858 8944 9216 9288 9402 9888 9984 10062 10368 10712 11008 11124 11232 12051 12288 12384 12536 13184 13287 13312 13416 13824 13932 14103 14832 14976 15093 16068 16384 16512 16686 16848 17716 17888 18432 18576 18804 19776 19968 20124 20371 20736 21424 22016 22248 22464 24102 24576 24768 25072 26368 26574 26624 26832 27648 27864 28206 29664 29952 30186 32136 32768 33024 33372 33696 35432 35776 36153 36864 37152 37608 39552 39861 39936 40248 40742 41472 42309 42848 44032 44496 44928 45279 48204 49152 49536 50144 52736 53148 53248 53664 55296 55728 56412 57577 59328 59904 60372 61113 64272 66048 66744 67381 67392 70864 71552 72306 73728 74304 75216 79104 79722 79872 80496 81484 82944 84618 85696 88064 88992 89856 90558 96408 98304 99072 100288 105472 106296 106496 107328 108459 110592 111456 112824 115154 118656 119583 119808 120744 122226 126927 128544 132096 133488 134762 134784 141728 143104 144612 147456 148608 150432 158208 159444 159744 160992 161401 162968 165888 169236 171392 172731 176128 177984 179712 181116 183339 192816 198144 200576 202143 210944 212592 212992 214656 216918 221184 222912 225648 230308 237312 239166 239616 241488 244452 253854 257088 264192 266976 269524 269568 283456 286208 289224 294912 297216 300864 316416 318888 319488 321984 322802 325936 331776 338472 342784 345462 352256 355968 358749 359424 362232 366678 385632 396288 401152 404286 421888 425184 425984 429312 433836 442368 445824 451296 460616 474624 478332 479232 482976 484203 488904 507708 514176 518193 528384 533952 539048 539136 550017 566912 572416 578448 594432 601728 606429 632832 637776 638976 643968 645604 651872 663552 676944 685568 690924 704512 711936 717498 718848 724464 733356 771264 792576 802304 808572 843776 850368 858624 867672 875953 884736 891648 902592 921232 949248 956664 958464 965952 968406 977808 1015416 1028352 1036386 1056768 1067904 1078096 1078272 1100034 1133824 1144832 1156896 1188864 1203456 1212858 1265664 1275552 1277952 1287936 1291208 1303744 1327104 1353888 1371136 1381848 1409024 1423872 1434996 1437696 1448928 1452609 1466712 1542528 1554579 1585152 1604608 1617144 1650051 1687552 1700736 1717248 1735344 1751906 1783296 1805184 1819287 1842464 1898496 1913328 1916928 1931904 1936812 1955616 2030832 2056704 2072772 2098213 2113536 2135808 2156192 2156544 2200068 2267648 2289664 2313792 2377728 2406912 2425716 2455489 2531328 2551104 2575872 2582416 2607488 2627859 2654208 2707776 2742272 2763696 2847744 2869992 2875392 2897856 2905218 2933424 3085056 3109158 3170304 3209216 3234288 3300102 3375104 3401472 3434496 3470688 3503812 3566592 3610368 3638574 3684928 3796992 3826656 3833856 3863808 3873624 3911232 4061664 4113408 4145544 4196426 4227072 4271616 4312384 4313088 4357827 4400136 4535296 4579328 4627584 4663737 4755456 4813824 4851432 4910978 5062656 5102208 5151744 5164832 5214976 5255718 5415552 5457861 5484544 5527392 5695488 5739984 5750784 5795712 5810436 5866848 6170112 6218316 6294639 6340608 6418432 6468576 6600204 6802944 6868992 6940243 6941376 7007624 7133184 7220736 7277148 7366467 7369856 7593984 7653312 7727616 7747248 7822464 7883577 8123328 8226816 8291088 8392852 8543232 8624768 8626176 8715654 8800272 9070592 9158656 9255168 9327474 9510912 9627648 9702864 9821956 10125312 10204416 10303488 10329664 10429952 10511436 10831104 10915722 10969088 11054784 11390976 11479968 11501568 11591424 11620872 11733696 12340224 12436632 12589278 12681216 12836864 12937152 13073481 13200408 13605888 13737984 13880486 13882752 14015248 14266368 14441472 14554296 14732934 14739712 15187968 15306624 15455232 15494496 15644928 15767154 16246656 16453632 16582176 16785704 17086464 17249536 17252352 17431308 17600544 18141184 18317312 18510336 18654948 18883917 19021824 19255296 19405728 19643912 20408832 20606976 20659328 20820729 20859904 21022872 21662208 21831444 21938176 22099401 22109568 22781952 22959936 23182848 23241744 23467392 23650731 24680448 24873264 25178556 25673728 25874304 26146962 26400816 27211776 27475968 27760972 27765504 28030496 28532736 28882944 29108592 29465868 29479424 30375936 30613248 30910464 30988992 31289856 31534308 31921357 32493312 32907264 33164352 33571408 34172928 34499072 34504704 34862616 35201088 36282368 37020672 37309896 37767834 38043648 38510592 38811456 39287824 40817664 41213952 41318656 41641458 41719808 42045744 43324416 43662888 43876352 44198802 44219136 45563904 45919872 46365696 46483488 46934784 47301462 49360896 49746528 50357112 51347456 51748608 52293924 52801632 54423552 54951936 55521944 55531008 56060992 56651751 57065472 57765888 58217184 58931736 58958848 61226496 61820928 61977984 62462187 62579712 63068616 63842714 64986624 65814528 66298203 66328704 67142816 68345856 68998144 69725232 70402176 70952193 72564736 74041344 74619792 75535668 77021184 77622912 78575648 81635328 82427904 82637312 83282916 83439616 84091488 86648832 87325776 88397604 88438272 90223159 91127808 91839744 92731392 92966976 93869568 94602924 95764071 98721792 99493056 100714224 103497216 104587848 105586027 105603264 108847104 111043888 111062016 112121984 113303502 114130944 115531776 116434368 117863472 117917696 122452992 123641856 123955968 124924374 125159424 126137232 127685428 129973248 131629056 132596406 132657408 134285632 136691712 137996288 139450464 140804352 141904386 145129472 148082688 149239584 151071336 154042368 155245824 157151296 163270656 164855808 165274624 166565832 166879232 168182976 169955253 173297664 174651552 176795208 176876544 180446318 183679488 185462784 185933952 187386561 187739136 189205848 191528142 197443584 198894609 198986112 201428448 206994432 209175696 211172054 211206528 217694208 222087776 222124032 224243968 226607004 231063552 232868736 235726944 235835392 244905984 247283712 247911936 249848748 250318848 252274464 252915367 255370856 259946496 265192812 265314816 268571264 270669477 273383424 275992576 278900928 281608704 283808772 287292213 296165376 298479168 302142672 310491648 314302592 316758081 326541312 330549248 333131664 333758464 336365952 339910506 346595328 349303104 353590416 353753088 360892636 367358976 370925568 371867904 374773122 375478272 378411696 383056284 394887168 397789218 397972224 402856896 413988864 418351392 422344108 422413056 435388416 444175552 444248064 448487936 453214008 462127104 465737472 471453888 471670784 489811968 494567424 495823872 499697496 500637696 504548928 505830734 510741712 519892992 530385624 530629632 537142528 541338954 551985152 557801856 562159683 563217408 567617544 574584426 592330752 596958336 604285344 620983296 628605184 633516162 653082624 661098496 666263328 667516928 672731904 679821012 693190656 698606208 707180832 707506176 721785272 734717952 741851136 743735808 749546244 750956544 756823392 758746101 766112568 795578436 795944448 805713792 812008431 827977728 836702784 844688216 844826112 861876639 888351104 888496128 896975872 906428016 931474944 942907776 943341568 950274243 979623936 991647744 999394992 1001275392 1009097856 1011661468 1021483424 1039785984 1060771248 1061259264 1074285056 1082677908 1103970304 1115603712 1124319366 1126434816 1135235088 1149168852 1184661504 1193916672 1208570688 1241966592 1257210368 1267032324 1306165248 1322196992 1332526656 1345463808 1359642024 1372618351 1386381312 1397212416 1414361664 1415012352 1443570544 1469435904 1483702272 1487471616 1499092488 1501913088 1513646784 1517492202 1532225136 1591156872 1591888896 1611427584 1624016862 1655955456 1673405568 1689376432 1689652224 1723753278 1776702208 1776992256 1793951744 1812856032 1862949888 1885815552 1886683136 1900548486 1959247872 1983295488 1998789984 2002550784 2018195712 2023322936 2042966848 2079571968 2121542496 2122518528 2148570112 2165355816 2207940608 2231207424 2248638732 2252869632 2270470176 2276238303 2298337704 2387833344 2417141376 2436025293 2483933184 2514420736 2534064648 2585629917 2644393984 2665053312 2690927616 2719284048 2745236702 2794424832 2828723328 2830024704 2850822729 2887141088 2938871808 2974943232 2998184976 3003826176 3027293568 3034984404 3064450272 3182313744 3183777792 3222855168 3248033724 3287899771 3311910912 3346811136 3378752864 3379304448 3447506556 3553404416 3553984512 3587903488 3625712064 3725899776 3771631104 3801096972 3918495744 3966590976 3997579968 4036391424 4046645872 4085933696 4117855053 4159143936 4243084992 4245037056 4297140224 4330711632 4462414848 4497277464 4505739264 4540940352 4552476606 4596675408 4775666688 4834282752 4872050586 4967866368 5028841472 5068129296 5171259834 5288787968 5330106624 5381855232 5438568096 5490473404 5588849664 5657446656 5660049408 5701645458 5774282176 5877743616 5949886464 5996369952 6007652352 6054587136 6069968808 6128900544 6364627488 6367555584 6445710336 6496067448 6575799542 6623821824 6693622272 6757505728 6758608896 6828714909 6895013112 7106808832 7175806976 7251424128 7308075879 7451799552 7543262208 7602193944 7933181952 7995159936 8072782848 8093291744 8171867392 8235710106 8486169984 8490074112 8552468187 8594280448 8661423264 8924829696 8994554928 9011478528 9081880704 9104953212 9193350816 9551333376 9668565504 9744101172 9863699313 9935732736 10057682944 10136258592 10342519668 10660213248 10763710464 10875360781 10877136192 10980946808 11177699328 11314893312 11403290916 11548564352 11755487232 11899772928 11992739904 12109174272 12139937616 12257801088 12353565159 12729254976 12735111168 12891420672 12992134896 13151599084 13387244544 13515011456 13517217792 13657429818 13790026224 14213617664 14351613952 14502848256 14616151758 14903599104 15086524416 15204387888 15866363904 15990319872 16145565696 16186583488 16343734784 16471420212 16972339968 16980148224 17104936374 17188560896 17322846528 17849659392 17989109856 18022957056 18163761408 18209906424 18386701632 19102666752 19337131008 19488202344 19727398626 19871465472 20115365888 20272517184 20486144727 20685039336 21320426496 21527420928 21750721562 21754272384 21961893616 22355398656 22629786624 22806581832 23097128704 23799545856 23985479808 24218348544 24279875232 24515602176 24707130318 25458509952 25470222336 25782841344 25984269792 26303198168 26774489088 27030022912 27034435584 27314859636 27580052448 28427235328 28703227904 29005696512 29232303516 29591097939 29807198208 30173048832 30408775776 31980639744 32291131392 32373166976 32626082343 32687469568 32942840424 33944679936 34209872748 34377121792 34645693056 35699318784 35978219712 36327522816 36419812848 36773403264 37060695477 38205333504 38674262016 38976404688 39454797252 40230731776 40545034368 40972289454 41370078672 42640852992 43054841856 43501443124 43508544768 43923787232 44710797312 45259573248 45613163664 46194257408 47599091712 47970959616 48436697088 48559750464 49031204352 49414260636 50917019904 50940444672 51565682688 51968539584 52606396336 53548978176 54060045824 54068871168 54629719272 55160104896 56854470656 58011393024 58464607032 59182195878 59614396416 60346097664 60817551552 63961279488 64582262784 64746333952 65252164686 65374939136 65885680848 67889359872 68419745496 68754243584 69291386112 71398637568 71956439424 72655045632 72839625696 73546806528 74121390954 76410667008 77348524032 77952809376 78909594504 80461463552 81090068736 81944578908 82740157344 85281705984 86109683712 87002886248 87017089536 87847574464 88773293817 89421594624 90519146496 91226327328 92388514816 95941919232 96873394176 97119500928 97878247029 98062408704 98828521272 101834039808 103131365376 103937079168 105212792672 107097956352 108120091648 109259438544 110320209792 111182086431 113708941312 116022786048 116929214064 118364391756 120692195328 121635103104 127922558976 129164525568 129492667904 130504329372 130749878272 131771361696 135778719744 136839490992 138582772224 141379690153 142797275136 143912878848 145310091264 145679251392 147093613056 148242781908 152821334016 154697048064 155905618752 157819189008 162180137472 163889157816 165480314688 170563411968 174005772496 174034179072 175695148928 177546587634 178843189248 181038292992 182452654656 184777029632 191883838464 193746788352 194239001856 195756494058 196124817408 197657042544 203668079616 206262730752 207874158336 210425585344 214195912704 216240183296 218518877088 220640419584 222364172862 227417882624 232045572096 233858428128 236728783512 241384390656 243270206208 255845117952 258329051136 258985335808 261008658744 261499756544 263542723392 266319881451 271557439488 273678981984 277165544448 282759380306 287825757696 290620182528 291358502784 293634741087 294187226112 296485563816 309394096128 311811237504 315638378016 324360274944 327778315632 330960629376 341126823936 348011544992 348068358144 351390297856 355093175268 362076585984 364905309312 369554059264 383767676928 387493576704 388478003712 391512988116 392249634816 395314085088 407336159232 415748316672 420851170688 424139070459 428391825408 432480366592 437037754176 441280839168 444728345724 464091144192 467716856256 473457567024 486540412416 511690235904 517970671616 522017317488 522999513088 527085446784 532639762902 543114878976 547357963968 554331088896 565518760612 575651515392 581240365056 582717005568 587269482174 588374452224 592971127632 618788192256 623622475008 631276756032 648720549888 655556631264 661921258752 682253647872 696023089984 696136716288 702780595712 710186350536 724153171968 729810618624 739108118528 767535353856 774987153408 776956007424 783025976232 784499269632 790628170176 814672318464 831496633344 841702341376 848278140918 864960733184 874075508352 880904223261 882561678336 889456691448 928182288384 935433712512 946915134048 973080824832 1023380471808 1035941343232 1044034634976 1045999026176 1054170893568 1065279525804 1086229757952 1094715927936 1108662177792 1131037521224 1151303030784 1162480730112 1165434011136 1174538964348 1176748904448 1185942255264 1247244950016 1262553512064 1272417211377 1297441099776 1311113262528 1323842517504 1392046179968 1392273432576 1405561191424 1420372701072 1459621237248 1478216237056 1535070707712 1553912014848 1566051952464 1568998539264 1581256340352 1629344636928 1662993266688 1683404682752 1696556281836 1729921466368 1748151016704 1761808446522 1765123356672 1778913382896 1856364576768 1870867425024 1893830268096 1946161649664 2046760943616 2071882686464 2088069269952 2108341787136 2130559051608 2172459515904 2189431855872 2217324355584 2262075042448 2302606061568 2324961460224 2330868022272 2349077928696 2353497808896 2371884510528 2494489900032 2525107024128 2544834422754 2594882199552 2622226525056 2647685035008 2784092359936 2784546865152 2811122382848 2840745402144 2919242474496 2956432474112 3070141415424 3107824029696 3132103904928 3137997078528 3162512680704 3258689273856 3325986533376 3366809365504 3393112563672 3459842932736 3496302033408 3523616893044 3530246713344 3557826765792 3741734850048 3787660536192 3817251634131 3892323299328 4143765372928 4176138539904 4216683574272 4261118103216 4378863711744 4434648711168 4524150084896 4605212123136 4661736044544 4698155857392 4706995617792 4743769021056 4988979800064 5050214048256 5089668845508 5189764399104 5244453050112 5295370070016 5568184719872 5569093730304 5622244765696 5681490804288 5838484948992 6140282830848 6215648059392 6264207809856 6325025361408 6517378547712 6651973066752 6733618731008 6786225127344 6992604066816 7047233786088 7060493426688 7115653531584 7483469700096 7575321072384 7634503268262 7784646598656 8287530745856 8352277079808 8433367148544 8522236206432 8757727423488 8869297422336 9048300169792 9210424246272 9323472089088 9396311714784 9413991235584 9487538042112 9977959600128 10100428096512 10179337691016 10379528798208 10488906100224 10590740140032 11136369439744 11244489531392 11362981608576 11451754902393 11676969897984 12431296118784 12528415619712 12650050722816 13303946133504 13467237462016 13572450254688 13985208133632 14094467572176 14120986853376 14231307063168 14966939400192 15150642144768 15269006536524 15569293197312 16704554159616 16866734297088 17044472412864 17515454846976 18096600339584 18420848492544 18646944178176 18792623429568 18975076084224 19955919200256 20200856193024 20358675382032 20977812200448 21181480280064 22272738879488 22488979062784 22725963217152 22903509804786 23353939795968 24862592237568 25056831239424 25300101445632 26607892267008 26934474924032 27144900509376 27970416267264 28188935144352 28241973706752 28462614126336 29933878800384 30301284289536 30538013073048 31138586394624 33409108319232 33733468594176 34088944825728 35030909693952 36193200679168 37293888356352 37585246859136 37950152168448 39911838400512 40401712386048 40717350764064 41955624400896 42362960560128 44545477758976 44977958125568 45451926434304 45807019609572 46707879591936 50113662478848 50600202891264 53868949848064 54289801018752 55940832534528 56377870288704 56925228252672 59867757600768 60602568579072 61076026146096 66818216638464 67466937188352 68177889651456 70061819387904 72386401358336 74587776712704 75170493718272 75900304336896 79823676801024 80803424772096 81434701528128 83911248801792 84725921120256 89090955517952 90903852868608 91614039219144 93415759183872 100227324957696 101200405782528 107737899696128 108579602037504 111881665069056 112755740577408 113850456505344 119735515201536 121205137158144 122152052292192 133636433276928 134933874376704 136355779302912 140123638775808 144772802716672 150340987436544 151800608673792 161606849544192 162869403056256 167822497603584 178181911035904 181807705737216 183228078438288 200454649915392 202400811565056 217159204075008 223763330138112 225511481154816 227700913010688 239471030403072 242410274316288 244304104584384 267272866553856 272711558605824 280247277551616 289545605433344 300681974873088 303601217347584 323213699088384 325738806112512 335644995207168 356363822071808 363615411474432 366456156876576 400909299830784 404801623130112 434318408150016 451022962309632 455401826021376 484820548632576 488608209168768 534545733107712 545423117211648 579091210866688 601363949746176 607202434695168 651477612225024 671289990414336 727230822948864 732912313753152 801818599661568 868636816300032 902045924619264 910803652042752 969641097265152 977216418337536 1069091466215424 1090846234423296 1158182421733376 1202727899492352 1214404869390336 1302955224450048 1454461645897728 1465824627506304 1603637199323136 1737273632600064 1804091849238528 1821607304085504 1954432836675072 2181692468846592 2316364843466752 2405455798984704 2605910448900096 2908923291795456 2931649255012608 3207274398646272 3474547265200128 3608183698477056 3643214608171008 3908865673350144 4363384937693184 4632729686933504 4810911597969408 5211820897800192 5863298510025216 6949094530400256 7216367396954112 7817731346700288 8726769875386368 9621823195938816 10423641795600384 11726597020050432 13898189060800512 14432734793908224 15635462693400576 20847283591200768 23453194040100864 28865469587816448 31270925386801152 41694567182401536 46906388080201728 62541850773602304 93812776160403456 125083701547204608 187625552320806912 375251104641613824
- Sum of all divisors σ(n): 1248210860850233280
- Sum of proper divisors (its aliquot sum) s(n): 872959756208619456
- 375251104641613824 is an abundant number, because the sum of its proper divisors (872959756208619456) is greater than itself. Its abundance is 497708651567005632
Bases of 375251104641613824
- Binary: 101001101010010100011100100001110011011110010000000000000002
- Hexadecimal: 0x53528E439BC8000
- Base-36: 2UMVEXMN7K00
Squares and roots of 375251104641613824
- 375251104641613824 squared (3752511046416138242) is 140813391534751408006991691147902976
- 375251104641613824 cubed (3752511046416138243) is 52840380721747538833199151602827776722518482012340224
-
The
square root of 375251104641613824 is 612577427.4666132553 -
The
cube root of 375251104641613824 is 721285.7072678873
Scales and comparisons
How big is 375251104641613824?- 375,251,104,641,613,824 seconds is equal to 11,931,824,399 years, 37 weeks, 5 days, 3 hours, 50 minutes, 24 seconds.
-
To count from 1 to 375,251,104,641,613,824 would take you about thirty-five billion, seven hundred ninety-five million, four hundred seventy-three thousand, one hundred ninety-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 375251104641613824 cubic inches would be around 60107.1 feet tall.
Recreational maths with 375251104641613824
- 375251104641613824 backwards is 428316146401152573
- The number of decimal digits it has is: 18
- The sum of 375251104641613824's digits is 63
- More coming soon!
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 375251104641613824 - Facts about the integer". Numbermatics.com. 2024. Web. 20 June 2024.
APA style:
Numbermatics. (2024). Number 375251104641613824 - Facts about the integer. Retrieved 20 June 2024, from https://numbermatics.com/n/375251104641613824/
Chicago style:
Numbermatics. 2024. "Number 375251104641613824 - Facts about the integer". https://numbermatics.com/n/375251104641613824/
The information we have on file for 375251104641613824 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
Keywords: Divisors of 375251104641613824, math, Factors of 375251104641613824, curriculum, school, college, exams, university, Prime factorization of 375251104641613824, STEM, science, technology, engineering, physics, economics, calculator, three hundred seventy-five quadrillion, two hundred fifty-one trillion, one hundred four billion, six hundred forty-one million, six hundred thirteen thousand, eight hundred twenty-four.