37458346756363328125000
37,458,346,756,363,328,125,000 is an even composite number composed of four prime numbers multiplied together.
37458346756363328125000 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of one thousand, six hundred divisors.
Prime factorization of 37458346756363328125000:
23 × 59 × 113 × 239
(2 × 2 × 2 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 11 × 11 × 11 × 23 × 23 × 23 × 23 × 23 × 23 × 23 × 23 × 23)See below for interesting mathematical facts about the number 37458346756363328125000 from the Numbermatics database.
Names of 37458346756363328125000
- Cardinal: 37458346756363328125000 can be written as Thirty-seven sextillion, four hundred fifty-eight quintillion, three hundred forty-six quadrillion, seven hundred fifty-six trillion, three hundred sixty-three billion, three hundred twenty-eight million, one hundred twenty-five thousand.
Scientific notation
- Scientific notation: 3.7458346756363328125 × 1022
Factors of 37458346756363328125000
Divisors of 37458346756363328125000
- Number of divisors d(n): 1600
-
Complete list of divisors:
1 2 4 5 8 10 11 20 22 23 25 40 44 46 50 55 88 92 100 110 115 121 125 184 200 220 230 242 250 253 275 440 460 484 500 506 529 550 575 605 625 920 968 1000 1012 1058 1100 1150 1210 1250 1265 1331 1375 2024 2116 2200 2300 2420 2500 2530 2645 2662 2750 2783 2875 3025 3125 4232 4600 4840 5000 5060 5290 5324 5500 5566 5750 5819 6050 6250 6325 6655 6875 10120 10580 10648 11000 11132 11500 11638 12100 12167 12500 12650 13225 13310 13750 13915 14375 15125 15625 21160 22264 23000 23276 24200 24334 25000 25300 26450 26620 27500 27830 28750 29095 30250 30613 31250 31625 33275 34375 46552 48668 50600 52900 53240 55000 55660 57500 58190 60500 60835 61226 62500 63250 64009 66125 66550 68750 69575 71875 75625 78125 97336 105800 111320 115000 116380 121000 121670 122452 125000 126500 128018 132250 133100 133837 137500 139150 143750 145475 151250 153065 156250 158125 166375 171875 232760 243340 244904 253000 256036 264500 266200 267674 275000 278300 279841 287500 290950 302500 304175 306130 312500 316250 320045 330625 332750 343750 347875 359375 378125 390625 486680 512072 529000 535348 556600 559682 575000 581900 605000 608350 612260 625000 632500 640090 661250 665500 669185 687500 695750 704099 718750 727375 756250 765325 781250 790625 831875 859375 1070696 1119364 1163800 1216700 1224520 1265000 1280180 1322500 1331000 1338370 1375000 1391500 1399205 1408198 1437500 1454750 1472207 1512500 1520875 1530650 1562500 1581250 1600225 1653125 1663750 1718750 1739375 1796875 1890625 1953125 2238728 2433400 2560360 2645000 2676740 2783000 2798410 2816396 2875000 2909500 2944414 3025000 3041750 3061300 3078251 3125000 3162500 3200450 3306250 3327500 3345925 3437500 3478750 3520495 3593750 3636875 3781250 3826625 3906250 3953125 4159375 4296875 5353480 5596820 5632792 5819000 5888828 6083500 6122600 6156502 6325000 6400900 6436343 6612500 6655000 6691850 6875000 6957500 6996025 7040990 7187500 7273750 7361035 7562500 7604375 7653250 7812500 7906250 8001125 8265625 8318750 8593750 8696875 8984375 9453125 11193640 11777656 12167000 12313004 12801800 12872686 13225000 13383700 13915000 13992050 14081980 14375000 14547500 14722070 15125000 15208750 15306500 15391255 15625000 15812500 16002250 16194277 16531250 16637500 16729625 17187500 17393750 17602475 17968750 18184375 18906250 19133125 19765625 20796875 21484375 24626008 25745372 26767400 27984100 28163960 29095000 29444140 30417500 30613000 30782510 31625000 32004500 32181715 32388554 33062500 33275000 33459250 33860761 34375000 34787500 34980125 35204950 35937500 36368750 36805175 37812500 38021875 38266250 39531250 40005625 41328125 41593750 42968750 43484375 44921875 47265625 51490744 55968200 58888280 60835000 61565020 64009000 64363430 64777108 66125000 66918500 67721522 69575000 69960250 70409900 70799773 71875000 72737500 73610350 75625000 76043750 76532500 76956275 79062500 80011250 80971385 82656250 83187500 83648125 85937500 86968750 88012375 89843750 90921875 94531250 95665625 98828125 103984375 123130040 128726860 129554216 133837000 135443044 139920500 140819800 141599546 145475000 147220700 148035889 152087500 153065000 153912550 158125000 160022500 160908575 161942770 165312500 166375000 167296250 169303805 171875000 173937500 174900625 176024750 179687500 181843750 184025875 189062500 190109375 191331250 197656250 200028125 206640625 207968750 217421875 236328125 257453720 270886088 279841000 283199092 294441400 296071778 304175000 307825100 320045000 321817150 323885540 330625000 334592500 338607610 347875000 349801250 352049500 353998865 359375000 363687500 368051750 372468371 378125000 380218750 382662500 384781375 395312500 400056250 404856925 413281250 415937500 418240625 434843750 440061875 454609375 472656250 478328125 494140625 519921875 566398184 592143556 615650200 643634300 647771080 669185000 677215220 699602500 704099000 707997730 727375000 736103500 740179445 744936742 760437500 765325000 769562750 778797503 790625000 800112500 804542875 809713850 826562500 831875000 836481250 846519025 869687500 874503125 880123750 909218750 920129375 945312500 950546875 956656250 988281250 1000140625 1033203125 1039843750 1087109375 1184287112 1287268600 1354430440 1399205000 1415995460 1472207000 1480358890 1489873484 1520875000 1539125500 1557595006 1600225000 1609085750 1619427700 1628394779 1653125000 1672962500 1693038050 1739375000 1749006250 1760247500 1769994325 1818437500 1840258750 1862341855 1890625000 1901093750 1913312500 1923906875 1976562500 2000281250 2024284625 2066406250 2079687500 2091203125 2174218750 2200309375 2273046875 2391640625 2599609375 2831990920 2960717780 2979746968 3078251000 3115190012 3218171500 3238855400 3256789558 3345925000 3386076100 3404825447 3498012500 3520495000 3539988650 3636875000 3680517500 3700897225 3724683710 3802187500 3826625000 3847813750 3893987515 3953125000 4000562500 4022714375 4048569250 4132812500 4159375000 4182406250 4232595125 4348437500 4372515625 4400618750 4546093750 4600646875 4752734375 4783281250 5000703125 5199218750 5435546875 5921435560 6230380024 6436343000 6513579116 6772152200 6809650894 6996025000 7079977300 7361035000 7401794450 7449367420 7604375000 7695627500 7787975030 8001125000 8045428750 8097138500 8141973895 8265625000 8364812500 8465190250 8566772533 8696875000 8745031250 8801237500 8849971625 9092187500 9201293750 9311709275 9505468750 9566562500 9619534375 10001406250 10121423125 10398437500 10456015625 10871093750 11001546875 11365234375 11958203125 13027158232 13619301788 14159954600 14803588900 14898734840 15391255000 15575950060 16090857500 16194277000 16283947790 16729625000 16930380500 17024127235 17133545066 17490062500 17602475000 17699943250 17912342569 18184375000 18402587500 18504486125 18623418550 19010937500 19133125000 19239068750 19469937575 20002812500 20113571875 20242846250 20796875000 20912031250 21162975625 21742187500 21862578125 22003093750 22730468750 23003234375 23763671875 23916406250 25003515625 27238603576 29607177800 31151900120 32181715000 32567895580 33860761000 34048254470 34267090132 34980125000 35399886500 35824685138 36805175000 37008972250 37246837100 37453079917 38021875000 38478137500 38939875150 40005625000 40227143750 40485692500 40709869475 41824062500 42325951250 42833862665 43484375000 43725156250 44006187500 44249858125 45460937500 46006468750 46558546375 47527343750 47832812500 48097671875 50007031250 50607115625 52280078125 55007734375 59791015625 65135791160 68096508940 68534180264 70799773000 71649370276 74017944500 74493674200 74906159834 76956275000 77879750300 78310985281 80454287500 80971385000 81419738950 83648125000 84651902500 85120636175 85667725330 87450312500 88012375000 88499716250 89561712845 90921875000 92012937500 92522430625 93117092750 95054687500 95665625000 96195343750 97349687875 100014062500 100567859375 101214231250 104560156250 105814878125 109312890625 110015468750 115016171875 119582031250 125017578125 136193017880 143298740552 148035889000 149812319668 155759500600 156621970562 160908575000 162839477900 169303805000 170241272350 171335450660 174900625000 176999432500 179123425690 184025875000 185044861250 186234185500 187265399585 190109375000 192390687500 194699375750 197035768259 200028125000 201135718750 202428462500 203549347375 209120312500 211629756250 214169313325 218625781250 220030937500 221249290625 230032343750 232792731875 239164062500 240488359375 250035156250 253035578125 261400390625 275038671875 299624639336 313243941124 325678955800 340482544700 342670901320 353998865000 358246851380 370089722500 372468371000 374530799170 384781375000 389398751500 391554926405 394071536518 402271437500 404856925000 407098694750 411983879087 418240625000 423259512500 425603180875 428338626650 437251562500 440061875000 442498581250 447808564225 460064687500 462612153125 465585463750 478328125000 480976718750 486748439375 500070312500 502839296875 506071156250 522800781250 529074390625 546564453125 550077343750 575080859375 626487882248 680965089400 716493702760 740179445000 749061598340 778797503000 783109852810 788143073036 804542875000 814197389500 823967758174 846519025000 851206361750 856677253300 861420838091 874503125000 884997162500 895617128450 920129375000 925224306250 931170927500 936326997925 961953437500 973496878750 985178841295 1000140625000 1005678593750 1012142312500 1017746736875 1045601562500 1058148781250 1070846566625 1093128906250 1100154687500 1106246453125 1150161718750 1163963659375 1202441796875 1265177890625 1375193359375 1498123196680 1566219705620 1576286146072 1628394779000 1647935516348 1702412723500 1713354506600 1722841676182 1769994325000 1791234256900 1801152661463 1850448612500 1862341855000 1872653995850 1923906875000 1946993757500 1957774632025 1970357682590 2011357187500 2024284625000 2035493473750 2059919395435 2091203125000 2116297562500 2128015904375 2141693133250 2186257812500 2200309375000 2212492906250 2239042821125 2300323437500 2313060765625 2327927318750 2404883593750 2433742196875 2514196484375 2530355781250 2645371953125 2750386718750 2875404296875 3132439411240 3295871032696 3404825447000 3445683352364 3582468513800 3602305322926 3700897225000 3745307991700 3893987515000 3915549264050 3940715365180 4022714375000 4070986947500 4119838790870 4232595125000 4256031808750 4283386266500 4307104190455 4372515625000 4424985812500 4478085642250 4531822669957 4600646875000 4626121531250 4655854637500 4681634989625 4809767187500 4867484393750 4925894206475 5028392968750 5060711562500 5088733684375 5290743906250 5354232833125 5500773437500 5531232265625 5750808593750 5819818296875 6012208984375 6325889453125 6891366704728 7204610645852 7490615983400 7831098528100 7881430730360 8141973895000 8239677581740 8512063617500 8566772533000 8614208380910 8849971625000 8956171284500 9005763307315 9063645339914 9252243062500 9311709275000 9363269979250 9475629219001 9619534375000 9734968787500 9788873160125 9851788412950 10056785937500 10121423125000 10177467368750 10299596977175 10581487812500 10640079521875 10708465666250 11001546875000 11062464531250 11195214105625 11501617187500 11565303828125 11639636593750 12024417968750 12168710984375 12570982421875 12651778906250 13226859765625 14409221291704 15662197056200 16479355163480 17024127235000 17228416761820 17912342569000 18011526614630 18127290679828 18504486125000 18726539958500 18951258438002 19469937575000 19577746320250 19703576825900 19812679276093 20113571875000 20354934737500 20599193954350 21162975625000 21280159043750 21416931332500 21535520952275 22124929062500 22390428211250 22659113349785 23003234375000 23130607656250 23279273187500 23408174948125 24048835937500 24337421968750 24629471032375 25141964843750 25303557812500 25443668421875 26453719531250 26771164165625 27656161328125 29099091484375 31629447265625 34456833523640 36023053229260 36254581359656 37453079917000 37902516876004 39155492640500 39407153651800 39625358552186 40709869475000 41198387908700 42560318087500 42833862665000 43071041904550 44249858125000 44780856422500 45028816536575 45318226699570 46261215312500 46558546375000 46816349896250 47378146095005 48097671875000 48674843937500 48944365800625 49258942064750 50283929687500 50607115625000 50887336843750 51497984885875 52907439062500 53200397609375 53542328331250 55312322656250 55976070528125 57826519140625 58198182968750 60843554921875 63258894531250 66134298828125 72046106458520 75805033752008 78310985281000 79250717104372 82396775817400 85120636175000 86142083809100 89561712845000 90057633073150 90636453399140 92522430625000 93632699792500 94756292190010 97349687875000 97888731601250 98517884129500 99063396380465 100567859375000 101774673687500 102995969771750 104231921409011 105814878125000 106400795218750 107084656662500 107677604761375 110624645312500 111952141056250 113295566748925 115653038281250 116396365937500 117040874740625 121687109843750 123147355161875 126517789062500 127218342109375 132268597656250 133855820828125 138280806640625 145495457421875 158501434208744 172284167618200 180115266146300 181272906798280 187265399585000 189512584380020 195777463202500 197035768259000 198126792760930 203549347375000 205991939543500 208463842818022 212801590437500 214169313325000 215355209522750 217939472037023 221249290625000 223904282112500 225144082682875 226591133497850 231306076562500 232792731875000 234081749481250 236890730475025 243374219687500 244721829003125 246294710323750 253035578125000 254436684218750 257489924429375 264537195312500 266001988046875 267711641656250 276561613281250 279880352640625 289132595703125 290990914843750 304217774609375 360230532292600 379025168760040 391554926405000 396253585521860 411983879087000 416927685636044 425603180875000 430710419045500 435878944074046 447808564225000 450288165365750 453182266995700 462612153125000 468163498962500 473781460950050 486748439375000 489443658006250 492589420647500 495316981902325 508873368437500 514979848858750 521159607045055 529074390625000 532003976093750 535423283312500 538388023806875 553123226562500 559760705281250 566477833744625 578265191406250 581981829687500 585204373703125 608435549218750 615736775809375 636091710546875 669279104140625 727477287109375 792507171043720 833855371272088 861420838091000 871757888148092 900576330731500 906364533991400 936326997925000 947562921900100 978887316012500 985178841295000 990633963804650 1017746736875000 1029959697717500 1042319214090110 1064007952187500 1070846566625000 1076776047613750 1089697360185115 1106246453125000 1119521410562500 1125720413414375 1132955667489250 1156530382812500 1163963659375000 1170408747406250 1184453652375125 1216871098437500 1223609145015625 1231473551618750 1272183421093750 1287449622146875 1330009940234375 1338558208281250 1399401763203125 1454954574218750 1521088873046875 1743515776296184 1801152661463000 1895125843800200 1957774632025000 1981267927609300 2059919395435000 2084638428180220 2128015904375000 2153552095227500 2179394720370230 2239042821125000 2251440826828750 2265911334978500 2313060765625000 2340817494812500 2368907304750250 2397334192407253 2433742196875000 2447218290031250 2462947103237500 2476584909511625 2544366842187500 2574899244293750 2605798035225275 2660019880468750 2677116416562500 2691940119034375 2798803526406250 2832389168723125 2909909148437500 2926021868515625 3042177746093750 3078683879046875 3180458552734375 3346395520703125 3962535855218600 4169276856360440 4307104190455000 4358789440740460 4502881653657500 4531822669957000 4681634989625000 4737814609500500 4794668384814506 4894436580062500 4925894206475000 4953169819023250 5088733684375000 5149798488587500 5211596070450550 5320039760937500 5354232833125000 5383880238068750 5448486800925575 5597607052812500 5628602067071875 5664778337446250 5819818296875000 5852043737031250 5922268261875625 6084355492187500 6118045725078125 6157367758093750 6360917105468750 6437248110734375 6650049701171875 6692791041406250 6997008816015625 8717578881480920 9005763307315000 9475629219001000 9589336769629012 9788873160125000 9906339638046500 10299596977175000 10423192140901100 10640079521875000 10767760476137500 10896973601851150 11195214105625000 11257204134143750 11329556674892500 11704087474062500 11844536523751250 11986670962036265 12168710984375000 12236091450156250 12314735516187500 12382924547558125 12721834210937500 12874496221468750 13028990176126375 13300099402343750 13385582082812500 13459700595171875 13994017632031250 14161945843615625 14630109342578125 15393419395234375 16731977603515625 19178673539258024 19812679276093000 20846384281802200 21535520952275000 21793947203702300 22514408268287500 22659113349785000 23408174948125000 23689073047502500 23973341924072530 24472182900312500 24629471032375000 24765849095116250 25443668421875000 25748992442937500 26057980352252750 26600198804687500 26771164165625000 26919401190343750 27242434004627875 27988035264062500 28143010335359375 28323891687231250 29260218685156250 29611341309378125 30590228625390625 30786838790468750 32186240553671875 33463955207031250 34985044080078125 43587894407404600 45028816536575000 47378146095005000 47946683848145060 48944365800625000 49531698190232500 51497984885875000 52115960704505500 53200397609375000 53838802380687500 54484868009255750 55976070528125000 56286020670718750 56647783374462500 58520437370312500 59222682618756250 59933354810181325 61180457250781250 61573677580937500 61914622737790625 64372481107343750 65144950880631875 66927910414062500 67298502975859375 69970088160156250 70809729218078125 73150546712890625 76967096976171875 95893367696290120 99063396380465000 104231921409011000 107677604761375000 108969736018511500 112572041341437500 113295566748925000 117040874740625000 118445365237512500 119866709620362650 122360914501562500 123147355161875000 123829245475581250 128744962214687500 130289901761263750 133855820828125000 134597005951718750 136212170023139375 139940176320312500 140715051676796875 141619458436156250 146301093425781250 148056706546890625 152951143126953125 153934193952343750 160931202768359375 217939472037023000 225144082682875000 236890730475025000 239733419240725300 244721829003125000 247658490951162500 257489924429375000 260579803522527500 269194011903437500 272424340046278750 279880352640625000 281430103353593750 283238916872312500 292602186851562500 296113413093781250 299666774050906625 305902286253906250 307868387904687500 309573113688953125 321862405536718750 325724754403159375 336492514879296875 354048646090390625 384835484880859375 479466838481450600 495316981902325000 521159607045055000 538388023806875000 544848680092557500 562860206707187500 566477833744625000 585204373703125000 592226826187562500 599333548101813250 611804572507812500 615736775809375000 619146227377906250 643724811073437500 651449508806318750 672985029758593750 681060850115696875 703575258383984375 708097292180781250 740283532734453125 769670969761718750 804656013841796875 1089697360185115000 1125720413414375000 1184453652375125000 1198667096203626500 1223609145015625000 1238292454755812500 1287449622146875000 1302899017612637500 1345970059517187500 1362121700231393750 1407150516767968750 1416194584361562500 1480567065468906250 1498333870254533125 1539341939523437500 1547865568444765625 1609312027683593750 1628623772015796875 1682462574396484375 1770243230451953125 2397334192407253000 2476584909511625000 2605798035225275000 2691940119034375000 2724243400462787500 2814301033535937500 2832389168723125000 2961134130937812500 2996667740509066250 3078683879046875000 3095731136889531250 3218624055367187500 3257247544031593750 3364925148792968750 3405304250578484375 3517876291919921875 3540486460903906250 3701417663672265625 5448486800925575000 5628602067071875000 5922268261875625000 5993335481018132500 6191462273779062500 6437248110734375000 6514495088063187500 6729850297585937500 6810608501156968750 7035752583839843750 7080972921807812500 7402835327344531250 7491669351272665625 7739327842223828125 8143118860078984375 8851216152259765625 11986670962036265000 12382924547558125000 13028990176126375000 13459700595171875000 13621217002313937500 14071505167679687500 14161945843615625000 14805670654689062500 14983338702545331250 15478655684447656250 16286237720157968750 17026521252892421875 17702432304519531250 18507088318361328125 27242434004627875000 28143010335359375000 29611341309378125000 29966677405090662500 30957311368895312500 32572475440315937500 34053042505784843750 35404864609039062500 37014176636722656250 37458346756363328125 38696639211119140625 40715594300394921875 59933354810181325000 61914622737790625000 65144950880631875000 68106085011569687500 70809729218078125000 74028353273445312500 74916693512726656250 77393278422238281250 81431188600789843750 85132606264462109375 136212170023139375000 148056706546890625000 149833387025453312500 154786556844476562500 162862377201579687500 170265212528924218750 187291733781816640625 203577971501974609375 299666774050906625000 309573113688953125000 325724754403159375000 340530425057848437500 374583467563633281250 407155943003949218750 425663031322310546875 681060850115696875000 749166935127266562500 814311886007898437500 851326062644621093750 936458668909083203125 1498333870254533125000 1628623772015796875000 1702652125289242187500 1872917337818166406250 3405304250578484375000 3745834675636332812500 4682293344545416015625 7491669351272665625000 9364586689090832031250 18729173378181664062500 37458346756363328125000
- Sum of all divisors σ(n): 100955044066911022707840
- Sum of proper divisors (its aliquot sum) s(n): 63496697310547694582840
- 37458346756363328125000 is an abundant number, because the sum of its proper divisors (63496697310547694582840) is greater than itself. Its abundance is 26038350554184366457840
Bases of 37458346756363328125000
- Binary: 1111110111010011110111111001110100000010101111010011100111101111000010010002
- Hexadecimal: 0x7EE9EFCE815E9CF7848
- Base-36: 63LAYH8I35IR1VS
Squares and roots of 37458346756363328125000
- 37458346756363328125000 squared (374583467563633281250002) is 1403127741719955065321046632326416015625000000
- 37458346756363328125000 cubed (374583467563633281250003) is 52558845492819080453068990767496278487953885181427001953125000000000
-
The
square root of 37458346756363328125000 is 193541589216.2801481345 -
37458346756363328125000 is a
perfect cube number . Itscube root is 33459250
Scales and comparisons
How big is 37458346756363328125000?- 37,458,346,756,363,328,125,000 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
-
To count from 1 to 37,458,346,756,363,328,125,000 would take you about two hundred ninety-three billion, two hundred seventy-four million, seven hundred one thousand and 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 37458346756363328125000 cubic inches would be around 2788270.8 feet tall.
Recreational maths with 37458346756363328125000
- 37458346756363328125000 backwards is 00052182336365764385473
- The number of decimal digits it has is: 23
- The sum of 37458346756363328125000's digits is 91
- 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 37458346756363328125000 - Facts about the integer". Numbermatics.com. 2024. Web. 28 April 2024.
APA style:
Numbermatics. (2024). Number 37458346756363328125000 - Facts about the integer. Retrieved 28 April 2024, from https://numbermatics.com/n/37458346756363328125000/
Chicago style:
Numbermatics. 2024. "Number 37458346756363328125000 - Facts about the integer". https://numbermatics.com/n/37458346756363328125000/
The information we have on file for 37458346756363328125000 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 37458346756363328125000, math, Factors of 37458346756363328125000, curriculum, school, college, exams, university, Prime factorization of 37458346756363328125000, STEM, science, technology, engineering, physics, economics, calculator, thirty-seven sextillion, four hundred fifty-eight quintillion, three hundred forty-six quadrillion, seven hundred fifty-six trillion, three hundred sixty-three billion, three hundred twenty-eight million, one hundred twenty-five thousand.