38789583644109375
38,789,583,644,109,375 is an odd composite number composed of six prime numbers multiplied together.
38789583644109375 is an odd composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two thousand and sixteen divisors.
Prime factorization of 38789583644109375:
33 × 56 × 7 × 11 × 175 × 292
(3 × 3 × 3 × 5 × 5 × 5 × 5 × 5 × 5 × 7 × 11 × 17 × 17 × 17 × 17 × 17 × 29 × 29)See below for interesting mathematical facts about the number 38789583644109375 from the Numbermatics database.
Names of 38789583644109375
- Cardinal: 38789583644109375 can be written as Thirty-eight quadrillion, seven hundred eighty-nine trillion, five hundred eighty-three billion, six hundred forty-four million, one hundred nine thousand, three hundred seventy-five.
Scientific notation
- Scientific notation: 3.8789583644109375 × 1016
Factors of 38789583644109375
Divisors of 38789583644109375
- Number of divisors d(n): 2016
-
Complete list of divisors:
1 3 5 7 9 11 15 17 21 25 27 29 33 35 45 51 55 63 75 77 85 87 99 105 119 125 135 145 153 165 175 187 189 203 225 231 255 261 275 289 297 315 319 357 375 385 425 435 459 493 495 525 561 595 609 625 675 693 725 765 783 825 841 867 875 935 945 957 1015 1071 1125 1155 1275 1305 1309 1375 1445 1479 1485 1575 1595 1683 1785 1827 1875 1925 2023 2079 2125 2175 2233 2295 2465 2475 2523 2601 2625 2805 2871 2975 3045 3125 3179 3213 3375 3451 3465 3625 3825 3915 3927 4125 4205 4335 4375 4437 4675 4725 4785 4913 5049 5075 5355 5423 5481 5625 5775 5887 6069 6375 6525 6545 6699 6875 7225 7395 7425 7569 7803 7875 7975 8381 8415 8613 8925 9135 9251 9375 9537 9625 10115 10353 10395 10625 10875 11165 11475 11781 12325 12375 12615 13005 13125 13311 14025 14297 14355 14739 14875 15225 15625 15895 16065 16269 16875 17255 17325 17661 18125 18207 19125 19575 19635 20097 20625 21025 21675 21875 22185 22253 22707 23375 23625 23925 24565 25143 25245 25375 26775 27115 27405 27753 28125 28611 28875 29435 30345 31059 31875 32625 32725 33495 34375 34391 35343 36125 36975 37125 37845 37961 39015 39375 39875 41905 42075 42891 43065 44217 44625 45675 46255 46875 47685 48125 48807 50575 51765 51975 52983 53125 54043 54375 54621 55825 57375 58667 58905 60291 61625 61875 63075 64757 65025 65625 66555 66759 70125 71485 71775 73695 74375 75429 76125 79475 80325 81345 83259 83521 84375 85833 86275 86625 88305 90625 91035 92191 93177 95625 97875 98175 100079 100485 103125 103173 105125 108375 109375 110925 111265 113535 113883 116875 118125 119625 122825 125715 126225 126875 128673 132651 133875 135575 137025 138765 140625 142477 143055 144375 146421 147175 151725 155295 157267 158949 159375 162129 163125 163625 167475 171875 171955 176001 176715 180625 184875 185625 189225 189805 194271 195075 196875 199375 200277 209525 210375 214455 215325 221085 223125 226287 228375 231275 238425 240625 243049 244035 249777 250563 252875 258825 259875 264915 265625 270215 271875 273105 276573 279125 286875 293335 294525 300237 301455 308125 309375 309519 315375 323785 325125 328125 332775 333795 341649 350625 357425 358875 368475 371875 377145 378301 380625 386019 397375 401625 406725 416295 417605 421875 427431 429165 431375 433125 441525 453125 455175 460955 465885 471801 478125 486387 489375 490875 500395 502425 515625 515865 525625 528003 541875 554625 556325 567675 569415 582813 584375 584647 590625 598125 600831 614125 628575 631125 634375 643365 645337 663255 669375 677875 685125 693825 712385 715275 721875 729147 732105 735875 751689 758625 776475 786335 794745 796875 810645 815625 818125 829719 837375 859775 880005 883575 900711 903125 918731 924375 928125 928557 946125 949025 971355 975375 984375 996875 997339 1001385 1024947 1047625 1051875 1072275 1076625 1100869 1105425 1115625 1131435 1134903 1141875 1156375 1192125 1203125 1215245 1220175 1248885 1252815 1264375 1282293 1294125 1299375 1324575 1351075 1359375 1365525 1382865 1395625 1415403 1419857 1434375 1459161 1466675 1472625 1501185 1507275 1540625 1546875 1547595 1567247 1576875 1584009 1618925 1625625 1663875 1668975 1701343 1708245 1748439 1753125 1753941 1787125 1794375 1842375 1859375 1885725 1891505 1903125 1930095 1936011 1986875 2008125 2033625 2081475 2088025 2137155 2145825 2156875 2165625 2187441 2207625 2255067 2275875 2304775 2329425 2359005 2390625 2422109 2431935 2446875 2454375 2489157 2501975 2512125 2579325 2628125 2640015 2673539 2702133 2709375 2756193 2773125 2781625 2838375 2847075 2914065 2921875 2923235 2953125 2990625 2992017 3004155 3070625 3142875 3155625 3171875 3216825 3226685 3302607 3316275 3346875 3389375 3404709 3425625 3469125 3561925 3576375 3609375 3645735 3660525 3679375 3758445 3793125 3846879 3882375 3931675 3973725 4053225 4078125 4090625 4131833 4148595 4186875 4246209 4259571 4298875 4400025 4417875 4503555 4515625 4593655 4621875 4640625 4642785 4701741 4730625 4745125 4856775 4876875 4984375 4986695 5006925 5104029 5124735 5238125 5259375 5261823 5361375 5383125 5504345 5527125 5578125 5657175 5674515 5709375 5781875 5808033 5960625 6076225 6100875 6244425 6264075 6321875 6411465 6431117 6470625 6496875 6562323 6622875 6755375 6827625 6914325 6978125 7077015 7099285 7171875 7266327 7295805 7333375 7363125 7505925 7536375 7703125 7737975 7836235 7884375 7920045 8020617 8094625 8128125 8268579 8319375 8344875 8506715 8541225 8742195 8765625 8769705 8935625 8971875 8976051 9211875 9428625 9457525 9515625 9650475 9680055 9907821 9934375 9938999 10040625 10168125 10214127 10407375 10440125 10685775 10729125 10784375 10828125 10937205 10970729 11038125 11275335 11379375 11523875 11647125 11795025 12110545 12159675 12234375 12271875 12395499 12445785 12509875 12560625 12778713 12896625 13140625 13200075 13367695 13510665 13546875 13780965 13865625 13908125 14105223 14191875 14235375 14570325 14616175 14953125 14960085 15020775 15312087 15353125 15618427 15714375 15778125 15785469 16084125 16133425 16513035 16581375 16734375 16946875 16954763 17023545 17128125 17345625 17424099 17809625 17881875 18228675 18302625 18396875 18714773 18792225 18965625 19234395 19293351 19411875 19658375 19868625 20266125 20453125 20659165 20742975 20934375 21231045 21297855 21494375 21798981 22000125 22089375 22517775 22968275 23109375 23213925 23508705 23653125 23725625 24061851 24283875 24384375 24805737 24933475 25034625 25520145 25623675 26190625 26296875 26309115 26643199 26806875 26915625 26928153 27521725 27635625 28285875 28372575 28546875 28909375 28922831 29040165 29723463 29803125 29816997 30381125 30504375 31222125 31320375 31609375 32057325 32155585 32353125 32484375 32811615 32912187 33114375 33776875 34138125 34571625 34890625 35385075 35496425 36331635 36479025 36666875 36815625 37186497 37529625 37681875 38336139 38689875 39181175 39421875 39600225 40103085 40473125 40640625 41175853 41342895 41596875 41724375 42315669 42533575 42706125 43710975 43848525 44678125 44859375 44880255 45450163 45936261 46059375 46855281 47143125 47287625 48252375 48400275 49539105 49671875 49694995 50203125 50840625 50864289 51070635 52036875 52200625 53428875 53645625 53921875 54686025 54853645 55190625 56144319 56376675 56896875 57619375 57880053 58235625 58975125 60552725 60798375 61359375 61977495 62228925 62549375 62803125 63893565 64483125 65396943 66000375 66838475 67553325 68904825 69328125 69540625 70241161 70526115 70959375 71176875 72185553 72851625 73080875 74800425 75103875 76560435 76765625 78092135 78571875 78890625 78927345 79929597 80420625 80667125 82565175 82906875 84734375 84773815 85117725 85640625 86728125 86768493 87120495 89048125 89409375 89450991 91143375 91513125 91984375 93573865 93961125 94828125 96171975 96466755 97059375 98291875 98736561 99343125 101330625 103295825 103714875 104671875 106155225 106489275 107471875 108994905 109328989 110000625 110446875 111559491 112588875 114841375 116069625 117543525 118265625 118628125 120309255 121419375 121921875 123527559 124028685 124667375 125173125 127600725 128118375 130953125 131545575 133215995 134034375 134578125 134640765 136350489 137608625 138178125 140565843 141429375 141862875 144546875 144614155 145200825 148617315 149015625 149084985 151905625 152521875 152592867 156110625 156601875 160286625 160777925 161765625 164058075 164560935 165571875 168432957 168884375 170690625 172858125 173640159 176925375 177482125 181658175 182395125 183334375 184078125 185932485 186502393 187648125 188409375 191680695 193449375 195905875 198001125 200515425 202365625 205879265 206714475 207984375 208621875 210723483 211578345 212667875 213530625 218554875 219242625 223390625 224401275 227250815 229681305 230296875 234276405 235715625 236438125 239788791 241261875 242001375 247695525 248474975 254203125 254321445 255353175 260184375 260305479 261003125 267144375 268228125 268352973 273430125 274268225 275953125 280721595 281883375 284484375 288096875 288230971 289400265 291178125 294875625 296209683 302763625 303991875 309887475 311144625 312746875 314015625 318151141 319467825 322415625 326984715 327986967 330001875 334192375 337766625 344524125 347703125 351205805 352630575 354796875 355884375 360927765 364258125 365404375 370582677 374002125 375519375 382802175 390460675 392859375 394636725 399647985 402103125 403335625 409051467 412825875 414534375 421697529 423869075 425588625 433640625 433842465 435602475 445240625 447046875 447254955 452934383 455716875 457565625 457778601 467869325 469805625 480859875 482333775 485296875 491459375 491688127 493682805 496715625 505298871 506653125 516479125 518574375 530776125 532446375 537359375 544974525 546644945 550003125 552234375 557797455 559507179 562944375 574206875 580348125 587717625 593140625 601546275 607096875 617637795 620143425 623336875 625865625 632170449 638003625 640591875 657727875 666079975 670171875 673203825 681752445 688043125 690890625 702829215 707146875 709314375 719366373 723070775 726004125 743086575 745424925 759528125 762609375 762964335 772652771 780553125 780916437 783009375 801433125 803889625 820290375 822804675 827859375 842164785 844421875 853453125 864290625 864692913 868200795 884626875 887410625 908290875 911975625 916671875 929662425 932511965 938240625 942046875 954453423 958403475 967246875 979529375 983960901 990005625 1002577125 1011828125 1029396325 1033572375 1043109375 1053617415 1057891725 1063339375 1067653125 1092774375 1096213125 1111748031 1122006375 1136254075 1148406525 1171382025 1178578125 1182190625 1194099737 1198943955 1206309375 1210006875 1227154401 1238477625 1242374875 1271607225 1276765875 1300921875 1301527395 1305015625 1335721875 1341140625 1341764865 1358803149 1367150625 1371341125 1403607975 1409416875 1440484375 1441154855 1447001325 1455890625 1474378125 1475064381 1481048415 1513818125 1519959375 1549437375 1555723125 1563734375 1590755705 1597339125 1612078125 1634923575 1639934835 1650009375 1670961875 1678521537 1688833125 1722620625 1756029025 1763152875 1779421875 1804638825 1821290625 1827021875 1852913385 1870010625 1877596875 1896511347 1914010875 1952303375 1973183625 1998239925 2010515625 2016678125 2045257335 2064129375 2072671875 2108487645 2119345375 2127943125 2169212325 2178012375 2226203125 2236274775 2264671915 2278584375 2287828125 2288893005 2317958313 2339346625 2349028125 2404299375 2411668875 2457296875 2458440635 2468414025 2483578125 2526494355 2533265625 2582395625 2592871875 2594078739 2653880625 2662231875 2724872625 2733224725 2750015625 2788987275 2797535895 2814721875 2863360269 2871034375 2901740625 2938588125 2951882703 3007731375 3035484375 3088188975 3100717125 3116684375 3129328125 3160852245 3170540681 3190018125 3202959375 3288639375 3330399875 3366019125 3408762225 3440215625 3514146075 3535734375 3546571875 3582299211 3596831865 3615353875 3630020625 3715432875 3727124625 3797640625 3814821675 3863263855 3902765625 3904582185 3915046875 4007165625 4019448125 4076409447 4101451875 4114023375 4210823925 4321453125 4323464565 4341003975 4423134375 4425193143 4437053125 4541454375 4559878125 4648312125 4662559825 4691203125 4772267115 4792017375 4836234375 4897646875 4919804505 4950028125 5012885625 5035564611 5146981625 5167861875 5268087075 5289458625 5316696875 5338265625 5408569397 5463871875 5481065625 5558740155 5610031875 5681270375 5742032625 5856910125 5910953125 5970498685 5994719775 6031546875 6050034375 6135772005 6192388125 6211874375 6358036125 6383829375 6507636975 6678609375 6708824325 6794015745 6835753125 6856705625 6953874939 7018039875 7047084375 7205774275 7235006625 7371890625 7375321905 7405242075 7569090625 7599796875 7747186875 7778615625 7782236217 7953778525 7986695625 8174617875 8199674175 8250046875 8354809375 8358698159 8392607685 8444165625 8590080807 8613103125 8780145125 8815764375 9023194125 9106453125 9135109375 9264566925 9350053125 9387984375 9482556735 9511622043 9570054375 9761516875 9865918125 9991199625 10083390625 10226286675 10320646875 10542438225 10596726875 10639715625 10746897633 10846061625 10890061875 11181373875 11323359575 11392921875 11444465025 11589791565 11696733125 11745140625 12021496875 12058344375 12229228341 12292203175 12342070125 12632471775 12911978125 12964359375 12970393695 13135097107 13269403125 13275579429 13311159375 13624363125 13666123625 13944936375 13987679475 14073609375 14316801345 14355171875 14508703125 14692940625 14759413515 15038656875 15440944875 15503585625 15583421875 15804261225 15852703405 15950090625 16014796875 16225708191 16443196875 16651999375 16830095625 17043811125 17201078125 17570730375 17732859375 17911496055 17984159325 18076769375 18150103125 18577164375 18635623125 19074108375 19316319275 19522910925 20035828125 20097240625 20382047235 20507259375 20570116875 20861624817 21054119625 21617322825 21705019875 22115671875 22125965715 22185265625 22707271875 22799390625 23241560625 23312799125 23861335575 23960086875 24488234375 24599022525 24750140625 25064428125 25076094477 25177823055 25734908125 25839309375 26340435375 26447293125 26583484375 27042846985 27319359375 27405328125 27793700775 28050159375 28406351875 28534866129 28710163125 29284550625 29852493425 29973598875 30250171875 30678860025 30961940625 31059371875 31790180625 31919146875 32240692899 32538184875 33544121625 33970078725 34178765625 34283528125 34769374695 35090199375 35235421875 36028871375 36175033125 36876609525 37026210375 37845453125 38735934375 38893078125 38911181085 39405291321 39768892625 39933478125 40873089375 40998370875 41774046875 41793490795 41963038425 42220828125 42950404035 43065515625 43900725625 44078821875 45115970625 46322834625 46750265625 47412783675 47558110215 47850271875 48677124573 48807584375 49329590625 49955998125 51131433375 51603234375 52712191125 52983634375 53198578125 53734488165 54230308125 54450309375 55906869375 56616797875 57222325125 57948957825 58483665625 60107484375 60291721875 61146141705 61461015875 61710350625 63162358875 64559890625 64851968475 65675485535 66347015625 66377897145 66555796875 68121815625 68330618125 69724681875 69938397375 71584006725 73464703125 73797067575 75193284375 75228283431 77204724375 77517928125 79021306125 79263517025 79750453125 81128540955 82215984375 83259996875 84150478125 85219055625 85604598387 87853651875 89557480275 89920796625 90383846875 90750515625 91945679749 92885821875 93178115625 95370541875 96581596375 97614554625 100486203125 101910236175 102536296875 102850584375 104308124085 105270598125 108086614125 108525099375 110629828575 113536359375 116207803125 116563995625 118215873963 119306677875 119800434375 122995112625 125322140625 125380472385 125889115275 128674540625 129196546875 131702176875 132236465625 135214234925 138968503875 140250796875 142031759375 142674330645 143550815625 146031373719 146422753125 149262467125 149867994375 153394300125 154809703125 155296859375 158950903125 159595734375 161203464495 162690924375 167720608125 169850393625 171417640625 173846873475 175450996875 180144356875 180875165625 184383047625 185131051875 193679671875 194555905425 197026456605 198844463125 199667390625 204365446875 204991854375 208967453975 209815192125 214752020175 219503628125 220394109375 225579853125 225684850293 231614173125 237063918375 237790551075 239251359375 243385622865 244037921875 246647953125 249779990625 255657166875 263560955625 264918171875 268672440825 271151540625 272251546875 275837039247 279534346875 283083989375 286111625625 289744789125 292418328125 301458609375 305730708525 307305079375 308551753125 315811794375 324259842375 328377427675 331889485725 340609078125 341653090625 348623409375 349691986875 354647621889 357920033625 368985337875 375966421875 376141417155 386023621875 387589640625 395106530625 396317585125 405642704775 416299984375 420752390625 426095278125 428022991935 439268259375 447787401375 449603983125 451919234375 459728398745 464429109375 465890578125 476852709375 482907981875 488072773125 509551180875 514252921875 521540620425 526352990625 540433070625 542625496875 553149142875 581039015625 582819978125 591079369815 596533389375 599002171875 614975563125 626902361925 629445576375 643372703125 658510884375 661182328125 676071174625 694842519375 710158796875 713371653225 717754078125 730156868595 732113765625 746312335625 749339971875 766971500625 794754515625 806017322475 813454621875 827511117741 838603040625 849251968125 869234367375 877254984375 900721784375 904375828125 921915238125 925655259375 972779527125 985132283025 994222315625 1021827234375 1024959271875 1044837269875 1049075960625 1073760100875 1097518140625 1127899265625 1128424251465 1158070865625 1185319591875 1188952755375 1216928114325 1248899953125 1278285834375 1317804778125 1343362204125 1355757703125 1379185196235 1397671734375 1415419946875 1430558128125 1448723945625 1528653542625 1536525396875 1542758765625 1579058971875 1621299211875 1641887138375 1659447428625 1708265453125 1743117046875 1748459934375 1773238109445 1789600168125 1844926689375 1880707085775 1930118109375 1975532653125 1981587925625 2028213523875 2130476390625 2140114959675 2196341296875 2238937006875 2248019915625 2298641993725 2384263546875 2414539909375 2440363865625 2482533353223 2547755904375 2607703102125 2631764953125 2702165353125 2713127484375 2765745714375 2914099890625 2955396849075 2982666946875 3074877815625 3134511809625 3147227881875 3292554421875 3380355873125 3474212596875 3566858266125 3650784342975 3731561678125 3746699859375 3834857503125 4030086612375 4067273109375 4137555588705 4193015203125 4246259840625 4346171836875 4503608921875 4609576190625 4628276296875 4863897635625 4925661415125 4971111578125 5124796359375 5224186349375 5245379803125 5368800504375 5642121257325 5790354328125 5926597959375 5944763776875 6084640571625 6391429171875 6589023890625 6716811020625 6895925981175 7077099734375 7152790640625 7243619728125 7643267713125 7682626984375 7895294859375 8106496059375 8209435691875 8297237143125 8742299671875 8866190547225 8948000840625 9224633446875 9403535428875 9877663265625 9907939628125 10141067619375 10700574798375 11194685034375 11240099578125 11493209968625 12072699546875 12201819328125 12412666766115 12738779521875 13038515510625 13510826765625 13828728571875 14776984245375 14913334734375 15374389078125 15672559048125 15736139409375 16901779365625 17371062984375 17834291330625 18253921714875 18657808390625 19174287515625 20150433061875 20687777943525 21231299203125 21730859184375 23047880953125 24319488178125 24628307075625 26120931746875 26226899015625 26844002521875 28210606286625 29632989796875 29723818884375 30423202858125 33584055103125 34479629905875 36218098640625 38216338565625 40532480296875 41047178459375 41486185715625 44330952736125 44740004203125 46123167234375 47017677144375 49539698140625 50705338096875 53502873991875 55973425171875 57466049843125 62063333830575 63693897609375 65192577553125 69143642859375 73884921226875 78362795240625 78680697046875 84508896828125 89171456653125 91269608574375 100752165309375 103438889717625 108654295921875 121597440890625 123141535378125 130604658734375 134220012609375 141053031433125 148619094421875 152116014290625 167920275515625 172398149529375 191081692828125 205235892296875 207430928578125 221654763680625 235088385721875 253526690484375 267514369959375 287330249215625 310316669152875 325962887765625 369424606134375 391813976203125 445857283265625 456348042871875 503760826546875 517194448588125 615707676890625 705265157165625 760580071453125 861990747646875 1108273818403125 1175441928609375 1337571849796875 1436651246078125 1551583345764375 1847123030671875 2281740214359375 2585972242940625 3526325785828125 4309953738234375 5541369092015625 7757916728821875 12929861214703125 38789583644109375
- Sum of all divisors σ(n): 98547902920696320
- Sum of proper divisors (its aliquot sum) s(n): 59758319276586945
- 38789583644109375 is an abundant number, because the sum of its proper divisors (59758319276586945) is greater than itself. Its abundance is 20968735632477570
Bases of 38789583644109375
- Binary: 100010011100111011101011101110100001011110101010001111112
- Hexadecimal: 0x89CEEBBA17AA3F
- Base-36: ALXRCQ0BY9R
Squares and roots of 38789583644109375
- 38789583644109375 squared (387895836441093752) is 1504631799283357540158136962890625
- 38789583644109375 cubed (387895836441093753) is 58364041031888585664168759940208818691253662109375
-
The
square root of 38789583644109375 is 196950713.7435896041 -
The
cube root of 38789583644109375 is 338510.1583922347
Scales and comparisons
How big is 38789583644109375?- 38,789,583,644,109,375 seconds is equal to 1,233,388,775 years, 42 weeks, 5 days, 9 hours, 56 minutes, 15 seconds.
-
To count from 1 to 38,789,583,644,109,375 would take you about three billion, seven hundred million, one hundred sixty-six thousand, three hundred twenty-seven 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 38789583644109375 cubic inches would be around 28209.2 feet tall.
Recreational maths with 38789583644109375
- 38789583644109375 backwards is 57390144638598783
- The number of decimal digits it has is: 17
- The sum of 38789583644109375's digits is 90
- 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 38789583644109375 - Facts about the integer". Numbermatics.com. 2024. Web. 3 June 2024.
APA style:
Numbermatics. (2024). Number 38789583644109375 - Facts about the integer. Retrieved 3 June 2024, from https://numbermatics.com/n/38789583644109375/
Chicago style:
Numbermatics. 2024. "Number 38789583644109375 - Facts about the integer". https://numbermatics.com/n/38789583644109375/
The information we have on file for 38789583644109375 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 38789583644109375, math, Factors of 38789583644109375, curriculum, school, college, exams, university, Prime factorization of 38789583644109375, STEM, science, technology, engineering, physics, economics, calculator, thirty-eight quadrillion, seven hundred eighty-nine trillion, five hundred eighty-three billion, six hundred forty-four million, one hundred nine thousand, three hundred seventy-five.