42546799411200
42,546,799,411,200 is an even composite number composed of six prime numbers multiplied together.
42546799411200 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two thousand, three hundred four divisors.
Prime factorization of 42546799411200:
215 × 33 × 52 × 72 × 37 × 1061
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 5 × 5 × 7 × 7 × 37 × 1061)See below for interesting mathematical facts about the number 42546799411200 from the Numbermatics database.
Names of 42546799411200
- Cardinal: 42546799411200 can be written as Forty-two trillion, five hundred forty-six billion, seven hundred ninety-nine million, four hundred eleven thousand, two hundred.
Scientific notation
- Scientific notation: 4.25467994112 × 1013
Factors of 42546799411200
Divisors of 42546799411200
- Number of divisors d(n): 2304
-
Complete list of divisors:
1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 25 27 28 30 32 35 36 37 40 42 45 48 49 50 54 56 60 63 64 70 72 74 75 80 84 90 96 98 100 105 108 111 112 120 126 128 135 140 144 147 148 150 160 168 175 180 185 189 192 196 200 210 216 222 224 225 240 245 252 256 259 270 280 288 294 296 300 315 320 333 336 350 360 370 378 384 392 400 420 432 441 444 448 450 480 490 504 512 518 525 540 555 560 576 588 592 600 630 640 666 672 675 700 720 735 740 756 768 777 784 800 840 864 882 888 896 900 925 945 960 980 999 1008 1024 1036 1050 1061 1080 1110 1120 1152 1176 1184 1200 1225 1260 1280 1295 1323 1332 1344 1350 1400 1440 1470 1480 1512 1536 1554 1568 1575 1600 1665 1680 1728 1764 1776 1792 1800 1813 1850 1890 1920 1960 1998 2016 2048 2072 2100 2122 2160 2205 2220 2240 2304 2331 2352 2368 2400 2450 2520 2560 2590 2646 2664 2688 2700 2775 2800 2880 2940 2960 3024 3072 3108 3136 3150 3183 3200 3330 3360 3456 3528 3552 3584 3600 3626 3675 3700 3780 3840 3885 3920 3996 4032 4096 4144 4200 4244 4320 4410 4440 4480 4608 4662 4704 4725 4736 4800 4900 4995 5040 5120 5180 5292 5305 5328 5376 5400 5439 5550 5600 5760 5880 5920 6048 6144 6216 6272 6300 6366 6400 6475 6615 6660 6720 6912 6993 7056 7104 7168 7200 7252 7350 7400 7427 7560 7680 7770 7840 7992 8064 8192 8288 8325 8400 8488 8640 8820 8880 8960 9065 9216 9324 9408 9450 9472 9549 9600 9800 9990 10080 10240 10360 10584 10610 10656 10752 10800 10878 11025 11100 11200 11520 11655 11760 11840 12096 12288 12432 12544 12600 12732 12800 12950 13230 13320 13440 13824 13986 14112 14208 14336 14400 14504 14700 14800 14854 15120 15360 15540 15680 15915 15984 16128 16317 16384 16576 16650 16800 16976 17280 17640 17760 17920 18130 18432 18648 18816 18900 18944 19098 19200 19425 19600 19980 20160 20480 20720 21168 21220 21312 21504 21600 21756 22050 22200 22281 22400 23040 23310 23520 23680 24192 24576 24864 24975 25088 25200 25464 25600 25900 26460 26525 26640 26880 27195 27648 27972 28224 28416 28647 28672 28800 29008 29400 29600 29708 30240 30720 31080 31360 31830 31968 32256 32634 32768 33075 33152 33300 33600 33952 34560 34965 35280 35520 35840 36260 36864 37135 37296 37632 37800 37888 38196 38400 38850 39200 39257 39960 40320 40960 41440 42336 42440 42624 43008 43200 43512 44100 44400 44562 44800 45325 46080 46620 47040 47360 47745 48384 48951 49152 49728 49950 50176 50400 50928 51200 51800 51989 52920 53050 53280 53760 54390 55296 55944 56448 56832 57294 57344 57600 58016 58275 58800 59200 59416 60480 61440 62160 62720 63660 63936 64512 65268 66150 66304 66600 66843 67200 67904 69120 69930 70560 71040 71680 72520 73728 74270 74592 75264 75600 75776 76392 76800 77700 78400 78514 79575 79920 80640 81585 81920 82880 84672 84880 85248 86016 86400 87024 88200 88800 89124 89600 90650 92160 93240 94080 94720 95490 96768 97902 98304 99456 99900 100352 100800 101856 102400 103600 103978 105840 106100 106560 107520 108780 110592 111405 111888 112896 113664 114588 114688 115200 116032 116550 117600 117771 118400 118832 120960 122880 124320 125440 127320 127872 129024 130536 132300 132608 133200 133686 134400 135808 135975 138240 139860 141120 142080 143235 143360 145040 147456 148540 149184 150528 151200 151552 152784 153600 155400 155967 156800 157028 159150 159840 161280 163170 163840 165760 169344 169760 170496 172032 172800 174048 174825 176400 177600 178248 179200 181300 184320 185675 186480 188160 189440 190980 193536 195804 196285 198912 199800 200529 200704 201600 203712 204800 207200 207956 211680 212200 213120 215040 217560 221184 222810 223776 225792 227328 229176 229376 230400 232064 233100 235200 235542 236800 237664 238725 241920 244755 245760 248640 250880 254640 255744 258048 259945 261072 264600 265216 266400 267372 268800 271616 271950 274799 276480 279720 282240 284160 286470 286720 290080 294912 297080 298368 301056 302400 303104 305568 307200 310800 311934 313600 314056 318300 319680 322560 326340 331520 334215 338688 339520 340992 344064 345600 348096 349650 352800 353313 355200 356496 358400 362600 368640 371350 372960 376320 378880 381960 387072 391608 392570 397824 399600 401058 401408 403200 407424 407925 409600 414400 415912 423360 424400 426240 430080 435120 442368 445620 447552 451584 454656 458352 460800 464128 466200 467901 470400 471084 473600 475328 477450 483840 489510 491520 497280 501760 509280 511488 516096 519890 522144 529200 530432 532800 534744 537600 543232 543900 549598 552960 557025 559440 564480 568320 572940 573440 580160 588855 594160 596736 602112 604800 606208 611136 614400 621600 623868 627200 628112 636600 639360 645120 652680 663040 668430 677376 679040 681984 688128 691200 696192 699300 705600 706626 710400 712992 716175 716800 725200 737280 742700 745920 752640 757760 763920 774144 779835 783216 785140 795648 799200 802116 802816 806400 814848 815850 819200 824397 828800 831824 846720 848800 852480 860160 870240 884736 891240 895104 903168 909312 916704 921600 928256 932400 935802 940800 942168 947200 950656 954900 967680 979020 981425 994560 1002645 1003520 1018560 1022976 1032192 1039780 1044288 1058400 1059939 1060864 1065600 1069488 1075200 1086464 1087800 1099196 1105920 1114050 1118880 1128960 1136640 1145880 1146880 1160320 1177710 1188320 1193472 1204224 1209600 1212416 1222272 1223775 1228800 1243200 1247736 1254400 1256224 1273200 1278720 1290240 1299725 1305360 1326080 1336860 1354752 1358080 1363968 1373995 1382400 1392384 1398600 1403703 1411200 1413252 1420800 1425984 1432350 1433600 1450400 1474560 1485400 1491840 1505280 1515520 1527840 1548288 1559670 1566432 1570280 1591296 1598400 1604232 1605632 1612800 1629696 1631700 1648794 1657600 1663648 1671075 1693440 1697600 1704960 1720320 1740480 1766565 1782480 1790208 1806336 1818624 1833408 1843200 1856512 1864800 1871604 1881600 1884336 1894400 1901312 1909800 1923593 1935360 1958040 1962850 1989120 2005290 2007040 2037120 2045952 2064384 2079560 2088576 2116800 2119878 2121728 2131200 2138976 2150400 2172928 2175600 2198392 2211840 2228100 2237760 2257920 2273280 2291760 2320640 2339505 2355420 2376640 2386944 2408448 2419200 2444544 2447550 2457600 2473191 2486400 2495472 2508800 2512448 2546400 2557440 2580480 2599450 2610720 2652160 2673720 2709504 2716160 2727936 2747990 2764800 2784768 2797200 2807406 2822400 2826504 2841600 2851968 2864700 2867200 2900800 2944275 2970800 2983680 3010560 3031040 3055680 3096576 3119340 3132864 3140560 3182592 3196800 3208464 3225600 3259392 3263400 3297588 3315200 3327296 3342150 3386880 3395200 3409920 3440640 3480960 3533130 3564960 3580416 3612672 3637248 3666816 3686400 3713024 3729600 3743208 3763200 3768672 3788800 3802624 3819600 3847186 3870720 3899175 3916080 3925700 3978240 4010580 4014080 4074240 4091904 4121985 4159120 4177152 4233600 4239756 4243456 4262400 4277952 4300800 4345856 4351200 4396784 4423680 4456200 4475520 4515840 4546560 4583520 4641280 4679010 4710840 4753280 4773888 4816896 4838400 4889088 4895100 4946382 4972800 4990944 5013225 5017600 5024896 5092800 5114880 5160960 5198900 5221440 5299695 5304320 5347440 5419008 5432320 5455872 5495980 5529600 5569536 5594400 5614812 5644800 5653008 5683200 5703936 5729400 5734400 5770779 5801600 5888550 5941600 5967360 6021120 6062080 6111360 6193152 6238680 6265728 6281120 6365184 6393600 6416928 6451200 6518784 6526800 6595176 6630400 6654592 6684300 6773760 6790400 6819840 6869975 6961920 7018515 7066260 7129920 7160832 7225344 7333632 7372800 7419573 7426048 7459200 7486416 7526400 7537344 7577600 7605248 7639200 7694372 7741440 7798350 7832160 7851400 7956480 8021160 8028160 8148480 8183808 8243970 8318240 8354304 8467200 8479512 8486912 8524800 8555904 8601600 8691712 8702400 8793568 8832825 8912400 8951040 9031680 9093120 9167040 9282560 9358020 9421680 9506560 9547776 9617965 9676800 9778176 9790200 9892764 9945600 9981888 10026450 10035200 10049792 10185600 10229760 10321920 10397800 10442880 10599390 10608640 10694880 10838016 10864640 10911744 10991960 11059200 11139072 11188800 11229624 11289600 11306016 11366400 11407872 11458800 11541558 11603200 11697525 11777100 11883200 11934720 12042240 12222720 12365955 12477360 12531456 12562240 12730368 12787200 12833856 12902400 13037568 13053600 13190352 13260800 13309184 13368600 13547520 13580800 13639680 13739950 13923840 14037030 14132520 14259840 14321664 14450688 14667264 14839146 14852096 14918400 14972832 15052800 15074688 15155200 15210496 15278400 15388744 15482880 15596700 15664320 15702800 15912960 16042320 16296960 16367616 16487940 16636480 16708608 16934400 16959024 17049600 17111808 17203200 17312337 17383424 17404800 17587136 17665650 17824800 17902080 18063360 18186240 18334080 18565120 18716040 18843360 19013120 19095552 19235930 19353600 19556352 19580400 19785528 19891200 19963776 20052900 20070400 20099584 20371200 20459520 20609925 20795600 20885760 21198780 21217280 21389760 21676032 21729280 21983920 22118400 22278144 22377600 22459248 22579200 22612032 22732800 22815744 22917600 23083116 23206400 23395050 23554200 23766400 23869440 24084480 24445440 24731910 24954720 25062912 25124480 25460736 25574400 25667712 25804800 26075136 26107200 26380704 26498475 26521600 26618368 26737200 27095040 27161600 27279360 27479900 27847680 28074060 28265040 28519680 28643328 28853895 29334528 29678292 29704192 29836800 29945664 30105600 30149376 30310400 30420992 30556800 30777488 30965760 31193400 31328640 31405600 31825920 32084640 32593920 32735232 32975880 33272960 33417216 33868800 33918048 34099200 34223616 34624674 34766848 34809600 35092575 35174272 35331300 35649600 35804160 36126720 36668160 37097865 37130240 37432080 37686720 38026240 38191104 38471860 38707200 39112704 39160800 39571056 39782400 39927552 40105800 40140800 40199168 40742400 40919040 41219850 41591200 41771520 42397560 42434560 42779520 43352064 43458560 43967840 44556288 44755200 44918496 45158400 45224064 45465600 45631488 45835200 46166232 46412800 46790100 47108400 47532800 47738880 48089825 48890880 49463820 49909440 50125824 50248960 51148800 51335424 51609600 51937011 52150272 52214400 52761408 52996950 53043200 53236736 53474400 54190080 54323200 54558720 54959800 55695360 56148120 56530080 57039360 57286656 57707790 58669056 59356584 59408384 59673600 59891328 60211200 60298752 60841984 61113600 61554976 61829775 62386800 62657280 62811200 63651840 64169280 65187840 65951760 66545920 66834432 67737600 67836096 68198400 68447232 69249348 69619200 70185150 70348544 70662600 71299200 71608320 72253440 73336320 74195730 74260480 74864160 75373440 76052480 76382208 76943720 77414400 78225408 78321600 79142112 79564800 79855104 80211600 80398336 81484800 81838080 82439700 83182400 83543040 84795120 85559040 86561685 86917120 87935680 89112576 89510400 89836992 90316800 90448128 90931200 91262976 91670400 92332464 92825600 93580200 94216800 95065600 95477760 96179650 97781760 98927640 99818880 100251648 100497920 102297600 102670848 103874022 104300544 104428800 105522816 105993900 106086400 106473472 106948800 108380160 108646400 109919600 111390720 112296240 113060160 114078720 114573312 115415580 117338112 118713168 119347200 119782656 120422400 120597504 121683968 122227200 123109952 123659550 124773600 125314560 125622400 127303680 128338560 130375680 131903520 133091840 133668864 135475200 135672192 136396800 136894464 138498696 139238400 140370300 140697088 141325200 142598400 143216640 144269475 146672640 148391460 148520960 149728320 150746880 152104960 153887440 154828800 156450816 156643200 158284224 159129600 159710208 160423200 160796672 162969600 163676160 164879400 166364800 167086080 169590240 171118080 173123370 173834240 175871360 178225152 179020800 179673984 180633600 180896256 182525952 183340800 184664928 185489325 185651200 187160400 188433600 190131200 190955520 192359300 195563520 197855280 199637760 200503296 200995840 204595200 205341696 207748044 208857600 211045632 211987800 212172800 212946944 213897600 216760320 217292800 219839200 222781440 224592480 226120320 228157440 229146624 230831160 234676224 237426336 238694400 239565312 241195008 243367936 244454400 246219904 247319100 249547200 250629120 251244800 256677120 259685055 260751360 263807040 266183680 267337728 270950400 271344384 272793600 273788928 276997392 278476800 280740600 281394176 282650400 285196800 286433280 288538950 293345280 296782920 297041920 299456640 301493760 304209920 307774880 312901632 313286400 316568448 318259200 319420416 320846400 321593344 325939200 329758800 332729600 334172160 339180480 342236160 346246740 351742720 358041600 359347968 361267200 361792512 365051904 366681600 369329856 370978650 371302400 374320800 376867200 380262400 381911040 384718600 391127040 395710560 399275520 401006592 401991680 409190400 410683392 415496088 417715200 422091264 423975600 425893888 427795200 432808425 434585600 439678400 445562880 449184960 452240640 456314880 461662320 469352448 474852672 477388800 479130624 482390016 488908800 492439808 494638200 499094400 501258240 502489600 513354240 519370110 521502720 527614080 532367360 534675456 541900800 542688768 547577856 553994784 556953600 561481200 562788352 565300800 570393600 572866560 577077900 586690560 593565840 598913280 602987520 608419840 615549760 626572800 633136896 636518400 638840832 641692800 643186688 651878400 659517600 665459200 668344320 678360960 684472320 692493480 703485440 716083200 718695936 723585024 730103808 733363200 738659712 741957300 742604800 748641600 753734400 760524800 769437200 782254080 791421120 798551040 802013184 803983360 818380800 821366784 830992176 835430400 844182528 847951200 851787776 855590400 865616850 869171200 879356800 891125760 898369920 904481280 912629760 923324640 938704896 949705344 954777600 958261248 964780032 977817600 984879616 989276400 998188800 1002516480 1004979200 1026708480 1038740220 1055228160 1064734720 1083801600 1085377536 1095155712 1107989568 1113907200 1122962400 1125576704 1130601600 1140787200 1145733120 1154155800 1173381120 1187131680 1197826560 1205975040 1216839680 1231099520 1253145600 1266273792 1277681664 1283385600 1286373376 1298425275 1303756800 1319035200 1330918400 1336688640 1356721920 1368944640 1384986960 1406970880 1432166400 1437391872 1447170048 1466726400 1477319424 1483914600 1485209600 1497283200 1507468800 1521049600 1538874400 1564508160 1582842240 1597102080 1604026368 1607966720 1642733568 1661984352 1670860800 1688365056 1695902400 1703575552 1711180800 1731233700 1758713600 1796739840 1808962560 1825259520 1846649280 1899410688 1909555200 1916522496 1929560064 1955635200 1969759232 1978552800 1996377600 2005032960 2009958400 2053416960 2077480440 2110456320 2129469440 2170755072 2190311424 2215979136 2227814400 2245924800 2251153408 2261203200 2281574400 2308311600 2346762240 2374263360 2395653120 2411950080 2462199040 2506291200 2532547584 2555363328 2566771200 2596850550 2607513600 2638070400 2661836800 2673377280 2713443840 2737889280 2769973920 2813941760 2864332800 2874783744 2894340096 2933452800 2954638848 2967829200 2994566400 3014937600 3042099200 3077748800 3165684480 3194204160 3215933440 3285467136 3323968704 3341721600 3376730112 3391804800 3422361600 3462467400 3517427200 3593479680 3617925120 3650519040 3693298560 3798821376 3833044992 3859120128 3911270400 3939518464 3957105600 3992755200 4010065920 4019916800 4106833920 4154960880 4220912640 4258938880 4341510144 4431958272 4455628800 4491849600 4502306816 4522406400 4563148800 4616623200 4693524480 4748526720 4791306240 4823900160 4924398080 5012582400 5065095168 5110726656 5133542400 5193701100 5276140800 5323673600 5426887680 5475778560 5539947840 5627883520 5728665600 5749567488 5788680192 5866905600 5909277696 5935658400 5989132800 6029875200 6084198400 6155497600 6331368960 6388408320 6431866880 6570934272 6647937408 6683443200 6753460224 6783609600 6844723200 6924934800 7034854400 7186959360 7235850240 7386597120 7597642752 7666089984 7822540800 7879036928 7914211200 7985510400 8020131840 8039833600 8213667840 8309921760 8441825280 8517877760 8683020288 8863916544 8983699200 9004613632 9044812800 9126297600 9233246400 9497053440 9582612480 9647800320 9848796160 10025164800 10130190336 10267084800 10387402200 10552281600 10647347200 10853775360 10951557120 11079895680 11255767040 11499134976 11577360384 11733811200 11818555392 11871316800 11978265600 12059750400 12310995200 12662737920 12776816640 13295874816 13366886400 13506920448 13567219200 13689446400 13849869600 14069708800 14373918720 14471700480 14773194240 15195285504 15332179968 15758073856 15828422400 15971020800 16079667200 16427335680 16619843520 16883650560 17366040576 17727833088 17967398400 18089625600 18252595200 18466492800 18994106880 19165224960 19295600640 19697592320 20050329600 20260380672 20534169600 20774804400 21104563200 21294694400 21707550720 22159791360 22511534080 22998269952 23467622400 23637110784 23742633600 23956531200 24119500800 24621990400 25325475840 25553633280 26591749632 27013840896 27134438400 27378892800 27699739200 28139417600 28747837440 28943400960 29546388480 30390571008 31516147712 31656844800 31942041600 32159334400 32854671360 33239687040 33767301120 34732081152 35455666176 35934796800 36179251200 36932985600 37988213760 38330449920 39395184640 40100659200 40520761344 41068339200 41549608800 42209126400 42589388800 43415101440 44319582720 45023068160 45996539904 47274221568 47485267200 47913062400 48239001600 49243980800 50650951680 53183499264 54268876800 54757785600 55399478400 56278835200 57495674880 57886801920 59092776960 60781142016 63032295424 63313689600 63884083200 66479374080 67534602240 70911332352 71869593600 72358502400 73865971200 75976427520 76660899840 78790369280 81041522688 82136678400 83099217600 84418252800 86830202880 88639165440 94548443136 94970534400 95826124800 96478003200 98487961600 101301903360 106366998528 108537753600 110798956800 112557670400 114991349760 118185553920 121562284032 126627379200 127768166400 132958748160 135069204480 141822664704 143739187200 144717004800 147731942400 151952855040 157580738560 164273356800 166198435200 168836505600 173660405760 177278330880 189096886272 189941068800 191652249600 196975923200 202603806720 212733997056 217075507200 221597913600 225115340800 229982699520 236371107840 243124568064 253254758400 265917496320 283645329408 287478374400 289434009600 295463884800 303905710080 315161477120 332396870400 337673011200 354556661760 379882137600 383304499200 393951846400 405207613440 425467994112 434151014400 443195827200 472742215680 506509516800 531834992640 567290658816 574956748800 590927769600 607811420160 664793740800 675346022400 709113323520 759764275200 787903692800 850935988224 868302028800 886391654400 945484431360 1013019033600 1063669985280 1149913497600 1181855539200 1215622840320 1329587481600 1418226647040 1519528550400 1575807385600 1701871976448 1772783308800 2026038067200 2127339970560 2363711078400 2659174963200 2836453294080 3039057100800 3545566617600 4254679941120 4727422156800 5318349926400 6078114201600 7091133235200 8509359882240 10636699852800 14182266470400 21273399705600 42546799411200
- Sum of all divisors σ(n): 186929548912800
- Sum of proper divisors (its aliquot sum) s(n): 144382749501600
- 42546799411200 is an abundant number, because the sum of its proper divisors (144382749501600) is greater than itself. Its abundance is 101835950090400
Bases of 42546799411200
- Binary: 10011010110010001100101101110110000000000000002
- Hexadecimal: 0x26B232DD8000
- Base-36: F2XQ9UDC0
Squares and roots of 42546799411200
- 42546799411200 squared (425467994112002) is 1810230140136888666685440000
- 42546799411200 cubed (425467994112003) is 77019498660512668211132031647612928000000
-
The
square root of 42546799411200 is 6522790.7686204377 -
The
cube root of 42546799411200 is 34910.4648686497
Scales and comparisons
How big is 42546799411200?- 42,546,799,411,200 seconds is equal to 1,352,856 years, 32 weeks.
-
To count from 1 to 42,546,799,411,200 would take you about three million, three hundred eighty-two thousand, one hundred forty-one 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 42546799411200 cubic inches would be around 2909.2 feet tall.
Recreational maths with 42546799411200
- 42546799411200 backwards is 00211499764524
- 42546799411200 is a
Harshad number . - The number of decimal digits it has is: 14
- The sum of 42546799411200's digits is 54
- 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 42546799411200 - Facts about the integer". Numbermatics.com. 2024. Web. 25 May 2024.
APA style:
Numbermatics. (2024). Number 42546799411200 - Facts about the integer. Retrieved 25 May 2024, from https://numbermatics.com/n/42546799411200/
Chicago style:
Numbermatics. 2024. "Number 42546799411200 - Facts about the integer". https://numbermatics.com/n/42546799411200/
The information we have on file for 42546799411200 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 42546799411200, math, Factors of 42546799411200, curriculum, school, college, exams, university, Prime factorization of 42546799411200, STEM, science, technology, engineering, physics, economics, calculator, forty-two trillion, five hundred forty-six billion, seven hundred ninety-nine million, four hundred eleven thousand, two hundred.