1018979618036688
1,018,979,618,036,688 is an even composite number composed of six prime numbers multiplied together.
1018979618036688 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two thousand, one hundred sixty divisors.
Prime factorization of 1018979618036688:
24 × 32 × 73 × 113 × 312 × 1272
(2 × 2 × 2 × 2 × 3 × 3 × 7 × 7 × 7 × 11 × 11 × 11 × 31 × 31 × 127 × 127)See below for interesting mathematical facts about the number 1018979618036688 from the Numbermatics database.
Names of 1018979618036688
- Cardinal: 1018979618036688 can be written as One quadrillion, eighteen trillion, nine hundred seventy-nine billion, six hundred eighteen million, thirty-six thousand, six hundred eighty-eight.
Scientific notation
- Scientific notation: 1.018979618036688 × 1015
Factors of 1018979618036688
Divisors of 1018979618036688
- Number of divisors d(n): 2160
-
Complete list of divisors:
1 2 3 4 6 7 8 9 11 12 14 16 18 21 22 24 28 31 33 36 42 44 48 49 56 62 63 66 72 77 84 88 93 98 99 112 121 124 126 127 132 144 147 154 168 176 186 196 198 217 231 242 248 252 254 264 279 294 308 336 341 343 363 372 381 392 396 434 441 462 484 496 504 508 528 539 558 588 616 651 682 686 693 726 744 762 784 792 847 868 882 889 924 961 968 1008 1016 1023 1029 1078 1089 1116 1143 1176 1232 1302 1331 1364 1372 1386 1397 1452 1488 1519 1524 1584 1617 1694 1736 1764 1778 1848 1922 1936 1953 2032 2046 2058 2156 2178 2232 2286 2352 2387 2541 2604 2662 2667 2728 2744 2772 2794 2883 2904 3038 3048 3069 3087 3234 3388 3472 3528 3556 3696 3751 3773 3844 3906 3937 3993 4092 4116 4191 4312 4356 4464 4557 4572 4774 4851 5082 5208 5324 5334 5456 5488 5544 5588 5766 5808 5929 6076 6096 6138 6174 6223 6468 6727 6776 7056 7112 7161 7502 7546 7623 7688 7812 7874 7986 8001 8184 8232 8382 8624 8649 8712 9114 9144 9317 9548 9702 9779 10164 10416 10571 10633 10648 10668 11088 11176 11253 11319 11532 11811 11858 11979 12152 12276 12348 12446 12573 12936 13454 13552 13671 14224 14322 15004 15092 15246 15367 15376 15624 15748 15972 16002 16129 16368 16464 16709 16764 17298 17424 17787 18228 18288 18634 18669 19096 19404 19558 20181 20328 21142 21266 21296 21336 21483 22352 22506 22638 23064 23622 23716 23958 24304 24552 24696 24892 25146 25872 26257 26908 27342 27559 27951 28644 29337 30008 30184 30492 30734 31248 31496 31713 31899 31944 32004 32258 33418 33528 33759 33957 34596 35433 35574 36456 37268 37338 38192 38808 39116 40362 40656 41261 41503 42284 42532 42672 42966 43307 43561 45012 45276 46101 46128 47089 47244 47432 47916 48387 49104 49392 49784 50127 50292 52514 53361 53816 54684 55118 55902 56007 57288 58674 60016 60368 60543 60984 61468 62992 63426 63798 63888 64008 64516 65219 66836 67056 67518 67914 68453 69192 70866 71148 72912 73997 74536 74676 77616 78232 78771 80724 82522 82677 83006 83853 84568 85064 85932 86614 87122 88011 90024 90552 92202 94178 94488 94864 95139 95697 95832 96774 99568 100254 100584 105028 106722 107569 107632 109368 110236 111804 112014 112903 114576 116281 116963 117348 121086 121968 122047 122936 123783 124509 126852 127596 128016 129032 129921 130438 130683 133672 135036 135828 136906 138303 138384 141267 141732 142296 145161 147994 149072 149352 150381 156464 157542 161448 165044 165354 166012 167706 169037 169136 170128 171864 173228 174244 176022 177419 180048 181104 183799 184404 188356 188976 190278 191394 191664 192913 193548 195657 200508 201168 205359 210056 213444 215138 218736 220472 221991 223608 224028 225806 232562 233926 234696 236313 242172 244094 245872 247566 248031 249018 253704 255192 258064 259842 260876 261366 267344 270072 271656 273812 276606 282534 283464 284592 288827 290322 295988 298704 300762 303149 315084 322707 322896 329623 330088 330708 332024 335412 338074 338709 343728 346456 348488 348843 350889 352044 354838 366141 367598 368808 371349 373527 376712 380556 382788 385826 387096 389763 391314 392049 401016 410718 420112 423801 426888 430276 440944 443982 447216 448056 451612 456533 465124 467852 469392 472626 476377 479171 484344 488188 495132 496062 498036 499999 507111 507408 510384 517979 519684 521752 522732 532257 540144 543312 547624 551397 553212 565068 566928 577654 578739 580644 586971 591976 601524 606298 616077 630168 645414 659246 660176 661416 664048 665973 670824 676148 677418 692912 696976 697686 701778 704088 709676 732282 735196 737616 742698 747054 752983 753424 761112 765576 771652 774192 779526 782628 784098 790321 802032 813967 821436 847602 853776 854329 860552 866481 887964 896112 903224 909447 913066 930248 935704 945252 952754 958342 968121 968688 976376 988869 990264 992124 996072 999998 1014222 1016127 1035958 1039368 1043504 1045464 1046529 1052667 1064514 1095248 1098423 1102794 1106424 1130136 1155308 1157478 1161288 1173942 1183259 1183952 1203048 1212596 1232154 1241933 1260336 1279091 1286593 1290828 1318492 1322832 1331946 1341648 1342517 1350391 1352296 1354836 1369599 1395372 1403556 1408176 1419352 1429131 1437513 1464564 1470392 1485396 1494108 1499997 1505966 1521333 1522224 1531152 1543304 1553937 1559052 1565256 1568196 1580642 1596771 1627934 1642872 1654191 1695204 1708658 1721104 1732962 1736217 1775928 1806448 1818894 1826132 1860496 1871408 1890504 1905508 1916684 1936242 1951609 1952752 1977738 1980528 1984248 1992144 1999996 2021789 2028444 2032254 2071916 2078736 2090928 2093058 2105334 2122043 2129028 2196846 2205588 2212848 2258949 2260272 2310616 2314956 2322576 2347884 2366518 2370963 2406096 2425192 2441901 2464308 2483866 2558182 2562987 2573186 2581656 2599443 2636984 2663892 2685034 2700782 2704592 2709672 2728341 2739198 2790744 2807112 2838704 2858262 2875026 2929128 2940784 2966607 2970792 2988216 2999994 3011932 3042666 3086608 3107874 3118104 3130512 3136392 3161284 3193542 3255868 3285744 3308382 3334639 3390408 3417316 3465924 3472434 3499993 3549777 3551856 3625853 3637788 3652264 3725799 3781008 3811016 3833368 3837273 3859779 3872484 3903218 3955476 3968496 3999992 4027551 4043578 4051173 4056888 4064508 4108797 4143832 4186116 4210668 4244086 4258056 4287393 4312539 4393692 4411176 4499991 4517898 4621232 4629912 4661811 4695768 4733036 4741926 4850384 4883802 4928616 4967732 5116364 5125974 5146372 5163312 5198886 5240147 5270881 5273968 5327784 5370068 5401564 5419344 5456682 5478396 5499989 5532247 5581488 5614224 5697769 5716524 5750052 5854827 5858256 5933214 5941584 5976432 5980303 5999988 6023864 6065367 6085332 6215748 6236208 6272784 6322568 6366129 6387084 6511736 6616764 6669278 6776847 6780816 6834632 6931848 6944868 6999986 7099554 7112889 7251706 7275576 7304528 7325703 7451598 7622032 7666736 7674546 7688961 7719558 7744968 7806436 7910952 7999984 8055102 8087156 8102346 8113776 8129016 8217594 8282813 8287664 8372232 8421336 8488172 8516112 8574786 8625078 8693531 8787384 8822352 8953637 8999982 9035796 9259824 9323622 9391536 9397619 9466072 9483852 9767604 9857232 9935464 10003917 10232728 10251948 10292744 10397772 10480294 10499979 10541762 10649331 10655568 10740136 10803128 10877559 10913364 10956792 10999978 11064494 11177397 11395538 11433048 11500104 11511819 11579337 11709654 11866428 11960606 11999976 12047728 12082653 12130734 12153519 12170664 12431496 12645136 12732258 12774168 13023472 13233528 13338556 13553694 13661263 13669264 13863696 13889736 13999972 14152523 14199108 14225778 14503412 14551152 14651406 14767687 14854301 14903196 15349092 15377922 15439116 15489936 15499969 15612872 15720441 15812643 15821904 16110204 16174312 16204692 16258032 16435188 16499967 16565626 16596741 16744464 16842672 16976344 17093307 17149572 17250156 17387062 17564481 17574768 17907274 17940909 17999964 18071592 18196101 18647244 18795238 18932144 18967704 19098387 19535208 19870928 20007834 20465456 20503896 20585488 20795544 20960588 20999958 21083524 21298662 21467699 21480272 21606256 21755118 21826728 21913584 21999956 22128988 22354794 22791076 22866096 23000208 23023638 23158674 23342473 23419308 23732856 23921212 23999952 24165306 24261468 24307038 24341328 24499951 24848439 24862992 25464516 25548336 26080593 26467056 26677112 26860911 27107388 27322526 27779472 27999944 28192857 28305046 28398216 28451556 29006824 29302812 29535374 29708602 29806392 30011751 30698184 30755844 30878232 30999938 31225744 31440882 31499937 31625286 32220408 32348624 32409384 32632677 32870376 32999934 33131252 33193482 33952688 34186614 34299144 34500312 34774124 35128962 35814548 35881818 35999928 36143184 36392202 36681029 37294488 37590476 37935408 38196774 38499923 39070416 39884383 40015668 40983789 41007792 41591088 41862121 41921176 41999916 42167048 42457569 42597324 42935398 43510236 43653456 43999912 44257976 44303061 44562903 44709588 45582152 46047276 46317348 46499907 46684946 46838616 47161323 47437929 47465712 47842424 48330612 48522936 48614076 48999902 49499901 49696878 49790223 50929032 51279921 52161186 53354224 53721822 53822727 54214776 54645052 55999888 56385714 56610092 56796432 56903112 57979691 58013648 58605624 59070748 59417204 59612784 60023502 60499879 60854717 61396368 61511688 61756464 61999876 62675459 62881764 62999874 63250572 64403097 64440816 64818768 65265354 65740752 65783333 65999868 66262504 66386964 68373228 68598288 69000624 69548248 70027419 70257924 71629096 71763636 71999856 72784404 73362058 73499853 74545317 74588976 75180952 76393548 76999846 78241779 79768766 80031336 80582733 81967578 83724242 83842352 83999832 84334096 84578571 84915138 85194648 85870796 87020472 87999824 88515952 88606122 89125806 89419176 91164304 92094552 92634696 92999814 93369892 93677232 94322646 94875858 95628841 95684848 96661224 97045872 97228152 97999804 98999802 99393756 99580446 101858064 102559842 103373809 104322372 107443644 107645454 108429552 108499783 109290104 110043087 112771428 113220184 113806224 115499769 115959382 117211248 118141496 118834408 119653149 120047004 120999758 121709434 122951367 123023376 123999752 125350918 125586363 125763528 125999748 126501144 127372707 128806194 130530708 131566666 131999736 132525008 132773928 132909183 133688709 136746456 139096496 139499721 140054838 140515848 143258192 143527272 145568808 146724116 146999706 149090634 150273893 150361904 152787096 153999692 156483558 159537532 160062672 161165466 162444557 163397311 163935156 167448484 167999664 169157142 169830276 170389296 170499659 171499657 171741592 173939073 174040944 177212244 178251612 178838352 181499637 182564151 184189104 185269392 185999628 186739784 188026377 188645292 189751716 191257682 193209291 193322448 194456304 195999608 197349999 197999604 198787512 199160892 205119684 206747618 208644744 210082257 214887288 215290908 216999566 218580208 220086174 220499559 225542856 226440368 230999538 231918764 236282992 237668816 239306298 240094008 241999516 243418868 245902734 247999504 250701836 251172726 251527056 251999496 253002288 254745414 256767203 257612388 261061416 263133332 263999472 265547856 265818366 267377418 269499461 273492912 278999442 280109676 281031696 286886523 287054544 291137616 293448232 293999412 298181268 300547786 305574192 307999384 310121427 312967116 319075064 322330932 324889114 325499349 326794622 327870312 330129261 334896968 338314284 339660552 340999318 342999314 343483184 346499307 347878146 354424488 356503224 358959447 362999274 365128302 371999256 373479568 376052754 376759089 377290584 379503432 382515364 386418582 391999216 394699998 395999208 397575024 398321784 410239368 413495236 417289488 420164514 423499153 429774576 430581816 433999132 438728213 440172348 440999118 450821679 451085712 460483331 461999076 463837528 478612596 480188016 483999032 486837736 487333671 490191933 491805468 501403672 502345452 503998992 509490828 511498977 513534406 514498971 515224776 521817219 522122832 526266664 531636732 534754836 538998922 544498911 547692453 557998884 560219352 564079131 573773046 586896464 587998824 592049997 596362536 601095572 615998768 620242854 625934232 638150128 644661864 649778228 650998698 653589244 655740624 660258522 665498669 669401887 669793936 676628568 679321104 681998636 685998628 692998614 695756292 708848976 713006448 717918894 723616663 725998548 730256604 743998512 752105508 753518178 754581168 759006864 759498481 765030728 770301609 772837164 789399996 791998416 796643568 808498383 820478736 826990472 840329028 846998306 860659569 861163632 867998264 877456426 880344696 881998236 901643358 920966662 923998152 927675056 930364281 957225192 967998064 973675472 974667342 976498047 980383866 983610936 1002807344 1004690904 1018981656 1022997954 1027068812 1028997942 1030449552 1043634438 1051917251 1052533328 1063273464 1069509672 1077997844 1088997822 1095384906 1115997768 1120438704 1128158262 1137111899 1147546092 1175997648 1184099994 1192725072 1193497613 1202191144 1240485708 1251868464 1270497459 1289323728 1299556456 1301997396 1307178488 1316184639 1320517044 1330997338 1338803774 1352465037 1353257136 1363997272 1371997256 1381449993 1385997228 1391512584 1435837788 1447233326 1451997096 1460513208 1462001013 1470575799 1504211016 1507036356 1518996962 1530061456 1534496931 1540603218 1543496913 1545674328 1578799992 1616996766 1653980944 1680658056 1693996612 1721319138 1735996528 1754912852 1760689392 1763996472 1797370421 1803286716 1841933324 1847996304 1860728562 1875496249 1886496227 1914450384 1949334684 1952996094 1960767732 1967221872 1996496007 2008205661 2009381808 2037963312 2045995908 2054137624 2057995884 2087268876 2103834502 2126546928 2139019344 2155995688 2170849989 2177995644 2190769812 2231995536 2256316524 2274223798 2278495443 2295092184 2310904827 2368199988 2386995226 2404382288 2425495149 2480971416 2540994918 2599112912 2603994792 2614356976 2632369278 2641034088 2661994676 2677607548 2704930074 2727994544 2743994512 2762899986 2771994456 2783025168 2871675576 2894466652 2903994192 2921026416 2924002026 2941151598 2964494071 3008422032 3014072712 3037993924 3068993862 3081206436 3086993826 3091348656 3155751753 3157599984 3233993532 3361316112 3387993224 3411335697 3442638276 3509825704 3527992944 3580492839 3594740842 3606573432 3683866648 3721457124 3750992498 3772992454 3811492377 3898669368 3905992188 3921535464 3948553917 3992992014 4016411322 4091991816 4108275248 4115991768 4144349979 4174537752 4207669004 4311991376 4341699978 4355991288 4381539624 4512633048 4548447596 4556990886 4590184368 4621809654 4658490683 4736399976 4773990452 4850990298 4961942832 5065316641 5081989836 5207989584 5264738556 5282068176 5316489367 5323989352 5355215096 5392111263 5409860148 5525799972 5543988912 5626488747 5659488681 5743351152 5788933304 5848004052 5882303196 5928988142 5989488021 6024616983 6028145424 6075987848 6137987724 6162412872 6173987652 6311503506 6467987064 6512549967 6775986448 6822671394 6835486329 6885276552 7019651408 7160985678 7189481684 7213146864 7363420757 7367733296 7442914248 7501984996 7545984908 7622984754 7797338736 7811984376 7843070928 7897107834 7959783293 7985984028 8032822644 8183983632 8231983536 8288699958 8349075504 8354483291 8415338008 8683399956 8711982576 8763079248 8893482213 9025266096 9096895192 9113981772 9243619308 9316981366 9467255259 9472799952 9547980904 9701980596 10130633282 10163979672 10234007091 10529477112 10632978734 10647978704 10710430192 10741478517 10784222526 10819720296 11051599944 11252977494 11318977362 11577866608 11696008104 11764606392 11857976284 11978976042 12049233966 12151975696 12275975448 12324825744 12347975304 12623007012 12935974128 13025099934 13128473743 13645342788 13670972658 13770553104 13975472049 14321971356 14378963368 14726841514 14885828496 15003969992 15091969816 15195949923 15245969508 15623968752 15794215668 15919566586 15949468101 15971968056 16065645288 16176333789 16577399916 16708966582 16830676016 16879466241 16978466043 17366799912 17786964426 18193790384 18227963544 18487238616 18633962732 18934510518 19095961808 19403961192 20261266564 20327959344 20468014182 20630458739 20751458497 21058954224 21265957468 21482957034 21568445052 21639440592 22090262271 22103199888 22505954988 22637954724 23392016208 23529212784 23715952568 23879349879 23957952084 24098467932 24551950896 24695950608 25063449873 25246014024 26050199868 26256947486 26680446639 27290685576 27341945316 27950944098 28643942712 28757926736 29453683028 30007939984 30183939632 30391899846 30491939016 31588431336 31839133172 31898936202 31943936112 32131290576 32352667578 32609434781 33154799832 33417933164 33758932482 33956932086 34733599824 35573928852 36455927088 36974477232 37267925464 37869021036 38807922384 39385421229 40522533128 40936028364 41260917478 41502916994 41926416147 42531914936 42965914068 43136890104 44180524542 45011909976 45275909448 45587849769 47431905136 47758699758 47848404303 47915904168 48196935864 50126899746 50492028048 52100399736 52513894972 53360893278 54581371152 54683890632 55718483051 55901888196 57287885424 58481383037 58907366056 60783799692 60983878032 61891376217 62254375491 63176862672 63678266344 63797872404 64705335156 65218869562 66270786813 66309599664 66835866328 67517864964 67913864172 71147857704 71638049637 74535850928 75190349619 75738042072 78770842458 81045066256 81872056728 82521834956 83005833988 83852832294 85063829872 85931828136 86273780208 88361049084 90023819952 90551818896 91175699538 91899316201 95517399516 95696808606 95831808336 96393871728 97828304343 100253799492 104200799472 105027789944 106721786556 109367781264 111436966102 111803776392 116962766074 117814732112 118156263687 121567599384 123782752434 124508750982 127356532688 127595744808 129410670312 130437739124 132541573626 133671732656 135035729928 135827728344 142295715408 143276099274 144413211173 150380699238 151476084144 157541684916 163744113456 165043669912 166011667976 167155449153 167705664588 171863656272 175444149111 176722098168 182351399076 183798632402 185674128651 186763126473 191034799032 191393617212 195656608686 200507598984 210055579888 213443573112 222873932204 223607552784 228266043467 233925532148 236312527374 243135198768 247565504868 249017501964 255191489616 258821340624 260875478248 265083147252 270071459856 271655456688 275697948603 286552198548 288826422346 293484913029 300761398476 315083369832 330087339824 332023335952 334310898306 335411329176 350888298222 353444196336 364702798152 367597264804 371348257302 373526252946 382069598064 382787234424 391313217372 401015197968 426887146224 433239633519 445747864408 456532086934 467851064296 472625054748 495131009736 498035003928 501466347459 521750956496 526332447333 530166294504 551395897206 573104397096 577652844692 586969826058 601522796952 630166739664 643295213407 668621796612 670822658352 684798130401 701776596444 729405596304 735194529608 742696514604 747052505892 765574468848 782626434744 827093845809 866479267038 891495728816 913064173868 935702128592 945250109496 990262019472 996070007856 1002932694918 1010892478211 1052664894666 1060332589008 1102791794412 1146208794192 1155305689384 1173939652116 1203045593904 1286590426814 1299718900557 1337243593224 1369596260802 1403553192888 1470389059216 1485393029208 1494105011784 1565252869488 1654187691618 1732958534076 1826128347736 1890500218992 1929885640221 2005865389836 2021784956422 2054394391203 2105329789332 2205583588824 2310611378768 2347879304232 2573180853628 2599437801114 2674487186448 2739192521604 2807106385776 2970786058416 2988210023568 3032677434633 3308375383236 3465917068152 3652256695472 3859771280442 4011730779672 4043569912844 4108788782406 4210659578664 4411167177648 4695758608464 5146361707256 5198875602228 5478385043208 5789656920663 6065354869266 6616750766472 6931834136304 7076247347477 7719542560884 8023461559344 8087139825688 8217577564812 8421319157328 9098032303899 10292723414512 10397751204456 10956770086416 11579313841326 12130709738532 13233501532944 14152494694954 15439085121768 16174279651376 16435155129624 18196064607798 20795502408912 21228742042431 23158627682652 24261419477064 28304989389908 30878170243536 32870310259248 36392129215596 42457484084862 46317255365304 48522838954128 56609978779816 63686226127293 72784258431192 84914968169724 92634510730608 113219957559632 127372452254586 145568516862384 169829936339448 254744904509172 339659872678896 509489809018344 1018979618036688
- Sum of all divisors σ(n): 3809743777756800
- Sum of proper divisors (its aliquot sum) s(n): 2790764159720112
- 1018979618036688 is an abundant number, because the sum of its proper divisors (2790764159720112) is greater than itself. Its abundance is 1771784541683424
Bases of 1018979618036688
- Binary: 111001111011000001101011100010101010011011110100002
- Hexadecimal: 0x39EC1AE2A9BD0
- Base-36: A174RVAZ80
Squares and roots of 1018979618036688
- 1018979618036688 squared (10189796180366882) is 1038319461974194572451714009344
- 1018979618036688 cubed (10189796180366883) is 1058026368762524175715430115160706034166812672
-
The
square root of 1018979618036688 is 31921460.1488824129 -
The
cube root of 1018979618036688 is 100628.6931012637
Scales and comparisons
How big is 1018979618036688?- 1,018,979,618,036,688 seconds is equal to 32,400,399 years, 49 weeks, 3 hours, 4 minutes, 48 seconds.
-
To count from 1 to 1,018,979,618,036,688 would take you about ninety-seven million, two hundred one 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 1018979618036688 cubic inches would be around 8385.7 feet tall.
Recreational maths with 1018979618036688
- 1018979618036688 backwards is 8866308169798101
- The number of decimal digits it has is: 16
- The sum of 1018979618036688's digits is 81
- 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 1018979618036688 - Facts about the integer". Numbermatics.com. 2024. Web. 11 May 2024.
APA style:
Numbermatics. (2024). Number 1018979618036688 - Facts about the integer. Retrieved 11 May 2024, from https://numbermatics.com/n/1018979618036688/
Chicago style:
Numbermatics. 2024. "Number 1018979618036688 - Facts about the integer". https://numbermatics.com/n/1018979618036688/
The information we have on file for 1018979618036688 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 1018979618036688, math, Factors of 1018979618036688, curriculum, school, college, exams, university, Prime factorization of 1018979618036688, STEM, science, technology, engineering, physics, economics, calculator, one quadrillion, eighteen trillion, nine hundred seventy-nine billion, six hundred eighteen million, thirty-six thousand, six hundred eighty-eight.