42218386569216
42,218,386,569,216 is an even composite number composed of seven prime numbers multiplied together.
42218386569216 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two thousand, three hundred four divisors.
Prime factorization of 42218386569216:
211 × 33 × 112 × 13 × 61 × 73 × 109
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 11 × 11 × 13 × 61 × 73 × 109)See below for interesting mathematical facts about the number 42218386569216 from the Numbermatics database.
Names of 42218386569216
- Cardinal: 42218386569216 can be written as Forty-two trillion, two hundred eighteen billion, three hundred eighty-six million, five hundred sixty-nine thousand, two hundred sixteen.
Scientific notation
- Scientific notation: 4.2218386569216 × 1013
Factors of 42218386569216
Divisors of 42218386569216
- Number of divisors d(n): 2304
-
Complete list of divisors:
1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 27 32 33 36 39 44 48 52 54 61 64 66 72 73 78 88 96 99 104 108 109 117 121 122 128 132 143 144 146 156 176 183 192 198 208 216 218 219 234 242 244 256 264 286 288 292 297 312 327 351 352 363 366 384 396 416 429 432 436 438 468 484 488 512 528 549 572 576 584 594 624 654 657 671 702 704 726 732 768 792 793 803 832 858 864 872 876 936 949 968 976 981 1024 1056 1089 1098 1144 1152 1168 1188 1199 1248 1287 1308 1314 1342 1404 1408 1417 1452 1464 1536 1573 1584 1586 1606 1647 1664 1716 1728 1744 1752 1872 1898 1936 1952 1962 1971 2013 2048 2112 2178 2196 2288 2304 2336 2376 2379 2398 2409 2496 2574 2616 2628 2684 2808 2816 2834 2847 2904 2928 2943 3072 3146 3168 3172 3212 3267 3294 3328 3432 3456 3488 3504 3597 3744 3796 3861 3872 3904 3924 3942 4026 4224 4251 4356 4392 4453 4576 4608 4672 4719 4752 4758 4796 4818 4992 5148 5232 5256 5368 5616 5632 5668 5694 5808 5856 5886 6039 6144 6292 6336 6344 6424 6534 6588 6649 6656 6864 6912 6976 7008 7137 7194 7227 7381 7488 7592 7722 7744 7808 7848 7884 7957 8052 8448 8502 8541 8712 8723 8784 8833 8906 9152 9216 9344 9438 9504 9516 9592 9636 9984 10296 10439 10464 10512 10736 10791 11232 11264 11336 11388 11616 11712 11772 12078 12584 12672 12688 12753 12848 13068 13176 13189 13298 13312 13359 13728 13824 13952 14016 14157 14274 14388 14454 14762 14976 15184 15444 15488 15587 15616 15696 15768 15914 16104 16896 17004 17082 17424 17446 17568 17666 17812 18117 18304 18432 18688 18876 19008 19032 19184 19272 19947 19968 20592 20878 20928 21024 21411 21472 21582 21681 22143 22464 22528 22672 22776 23232 23424 23544 23871 24156 25168 25344 25376 25506 25623 25696 26136 26169 26352 26378 26499 26596 26624 26718 27456 27648 27904 28032 28314 28548 28776 28908 29524 29952 30368 30888 30976 31174 31232 31317 31392 31536 31828 32208 32373 33792 34008 34164 34848 34892 35136 35332 35624 36234 36608 37376 37752 38016 38064 38259 38368 38544 39567 39894 39936 40077 41184 41756 41856 42048 42471 42822 42944 43164 43362 44286 44928 45344 45552 46464 46761 46848 47088 47742 48312 48983 50336 50688 50752 51012 51246 51392 52272 52338 52704 52756 52998 53192 53436 54912 55296 55808 56064 56628 57096 57552 57816 57889 59048 59841 59904 60736 61776 61952 62348 62464 62634 62784 63072 63656 64416 64746 66429 67584 68016 68328 69696 69784 70272 70664 71248 71613 72468 73139 73216 74752 75504 76032 76128 76518 76736 77088 78507 79134 79497 79788 79872 80154 82368 83512 83712 84096 84942 85644 85888 86328 86437 86724 87527 88572 89856 90688 91104 92928 93522 93696 93951 94176 95484 95953 96624 97966 100672 101376 101504 102024 102492 102784 103441 104544 104676 105408 105512 105996 106384 106872 109824 111616 112128 113256 114192 114829 115104 115632 115778 118096 118701 119682 119808 120231 121472 123552 123904 124696 124928 125268 125568 126144 127312 128832 129492 132858 136032 136656 139392 139568 140283 140544 141328 142496 143226 144936 146278 146432 146949 149504 151008 152064 152256 153036 153472 154176 157014 158268 158994 159576 160308 164736 167024 167424 168192 169884 171288 171457 171776 172656 172874 173448 173667 175054 177144 179523 179712 181376 182208 185856 187044 187392 187902 188352 190968 191906 193248 195932 199287 201344 202752 203008 204048 204984 205568 206882 209088 209352 210816 211024 211992 212768 213744 214839 219417 219648 223232 224256 226512 228384 229658 230208 231264 231556 235521 236192 237402 238491 239364 239616 240462 242944 247104 247808 249392 250536 251136 252288 254624 257664 258984 259311 262581 265716 272064 273312 278784 279136 280566 281088 281853 282656 284992 286452 287859 289872 292556 292864 293898 302016 304128 304512 306072 306944 308352 310323 314028 316536 317988 319152 320616 329472 334048 334848 336384 339768 342576 342914 343552 344487 345312 345748 346896 347334 350108 354288 356103 359046 359424 362752 364416 371712 374088 374784 375804 376704 381936 383812 386496 391864 398574 402688 406016 408096 409968 411136 413764 418176 418704 420849 421632 422048 423984 425536 427488 429678 438834 439296 440847 448512 453024 456768 459316 460416 462528 463112 471042 472384 474804 476982 478728 480924 485377 485888 494208 498784 501072 502272 504576 509248 514371 515328 517968 518622 521001 525162 531432 538813 544128 546624 557568 558272 561132 562176 563706 565312 569984 572904 575718 579744 585112 587796 604032 608256 609024 612144 613888 616704 620646 628056 633072 635976 636779 638304 641232 658251 658944 668096 669696 672768 679536 685152 685828 687104 688974 690624 691496 693792 694668 700216 708576 712206 718092 718848 725504 728832 743424 748176 751608 753408 763872 767624 772992 777933 783728 787743 797148 804529 805376 812032 816192 819936 822272 827528 836352 837408 841698 843264 844096 847968 851072 854976 859356 863577 877668 878592 881694 906048 913536 918632 920832 925056 926224 930969 942084 944768 949608 950807 953964 957456 961848 962797 970754 971776 988416 997568 1002144 1004544 1009152 1018496 1028742 1030656 1033461 1035936 1037244 1042002 1050324 1062864 1077626 1088256 1093248 1115136 1116544 1122264 1124352 1127412 1130624 1137851 1139968 1145808 1151436 1159488 1170224 1175592 1208064 1218048 1224288 1227776 1233408 1241292 1256112 1266144 1271952 1273558 1276608 1282464 1316502 1317888 1322541 1336192 1345536 1359072 1370304 1371656 1374208 1377948 1381248 1382992 1387584 1389336 1400432 1417152 1424412 1436184 1451008 1456131 1457664 1496352 1503216 1506816 1527744 1535248 1543113 1545984 1555866 1563003 1567456 1575486 1594296 1609058 1610752 1616439 1624064 1632384 1639872 1644544 1655056 1672704 1674816 1683396 1686528 1688192 1695936 1702144 1709952 1718712 1727154 1755336 1763388 1812096 1827072 1837264 1841664 1850112 1852448 1861938 1884168 1889536 1899216 1901614 1907928 1910337 1914912 1923696 1925594 1941508 1943552 1974753 1976832 1995136 2004288 2009088 2018304 2036992 2057484 2061312 2066922 2071872 2074488 2084004 2100648 2125728 2155252 2176512 2186496 2230272 2233088 2244528 2254824 2261248 2275702 2279936 2291616 2302872 2318976 2333799 2340448 2351184 2363229 2413587 2416128 2436096 2448576 2455552 2466816 2482584 2512224 2532288 2543904 2547116 2553216 2564928 2590731 2633004 2635776 2645082 2672384 2718144 2740608 2743312 2755896 2762496 2765984 2775168 2778672 2792907 2800864 2834304 2848824 2852421 2872368 2888391 2902016 2912262 2915328 2992704 3006432 3013632 3055488 3070496 3086226 3091968 3100383 3111732 3126006 3134912 3150972 3188592 3218116 3221504 3232878 3264768 3279744 3310112 3345408 3349632 3366792 3373056 3376384 3391872 3404288 3413553 3419904 3437424 3454308 3510672 3526776 3624192 3654144 3674528 3683328 3700224 3704896 3723876 3768336 3779072 3798432 3803228 3815856 3820674 3829824 3847392 3851188 3883016 3949506 3953664 3990272 4008576 4036608 4073984 4114968 4122624 4133844 4143744 4148976 4168008 4201296 4251456 4310504 4353024 4368393 4372992 4466176 4489056 4509648 4522496 4551404 4559872 4583232 4605744 4629339 4637952 4667598 4680896 4702368 4726458 4827174 4832256 4849317 4872192 4897152 4933632 4965168 5024448 5064576 5087808 5094232 5106432 5129856 5181462 5266008 5290164 5339147 5344768 5436288 5481216 5486624 5511792 5524992 5531968 5550336 5557344 5585814 5601728 5668608 5697648 5704842 5731011 5744736 5776782 5824524 5830656 5985408 6012864 6027264 6110976 6140992 6172452 6183936 6200766 6223464 6252012 6269824 6301944 6309901 6377184 6436232 6465756 6529536 6559488 6620224 6690816 6699264 6733584 6752768 6783744 6808576 6827106 6839808 6874848 6908616 7004569 7021344 7053552 7240761 7248384 7308288 7349056 7366656 7400448 7409792 7447752 7536672 7558144 7596864 7606456 7631712 7641348 7659648 7694784 7702376 7766032 7899012 7907328 7980544 8017152 8147968 8229936 8267688 8287488 8297952 8336016 8402592 8502912 8557263 8621008 8665173 8706048 8736786 8745984 8932352 8978112 9019296 9044992 9102808 9119744 9166464 9211488 9258678 9275904 9335196 9361792 9404736 9452916 9654348 9664512 9698634 9794304 9930336 10048896 10129152 10175616 10188464 10212864 10240659 10259712 10362924 10458877 10532016 10580328 10678294 10689536 10872576 10962432 10973248 11023584 11049984 11063936 11100672 11114688 11171628 11203456 11337216 11395296 11409684 11462022 11489472 11553564 11649048 11970816 12025728 12221952 12281984 12344904 12367872 12401532 12446928 12504024 12516361 12539648 12603888 12619802 12754368 12872464 12931512 13059072 13105179 13118976 13240448 13398528 13467168 13505536 13567488 13617152 13654212 13679616 13749696 13817232 14009138 14042688 14107104 14481522 14496768 14547951 14616576 14698112 14800896 14819584 14895504 15073344 15116288 15193728 15212912 15263424 15282696 15319296 15389568 15404752 15532064 15798024 15961088 16017441 16034304 16295936 16459872 16535376 16574976 16595904 16672032 16805184 17005824 17114526 17193033 17242016 17330346 17473572 17491968 17864704 17956224 18038592 18089984 18205616 18332928 18422976 18517356 18551808 18670392 18723584 18809472 18905832 18929703 19308696 19397268 19588608 19860672 20097792 20258304 20351232 20376928 20425728 20481318 20519424 20725848 20917754 21013707 21064032 21160656 21356588 21379072 21722283 21745152 21924864 21946496 22047168 22099968 22127872 22201344 22229376 22343256 22406912 22674432 22790592 22819368 22924044 22978944 23107128 23298096 23941632 24051456 24443904 24563968 24689808 24803064 24893856 25008048 25032722 25079296 25207776 25239604 25508736 25671789 25744928 25863024 25995519 26118144 26210358 26237952 26480896 26797056 26934336 27011072 27134976 27308424 27359232 27499392 27634464 28018276 28085376 28214208 28963044 28993536 29095902 29396224 29639168 29791008 30146688 30387456 30425824 30526848 30565392 30638592 30721977 30779136 30809504 31064128 31376631 31596048 31922176 32034882 32068608 32919744 33070752 33149952 33191808 33344064 33610368 34011648 34229052 34386066 34484032 34660692 34947144 35912448 36077184 36411232 36665856 36845952 37034712 37103616 37340784 37447168 37549083 37618944 37811664 37859406 38617392 38794536 39177216 39721344 40195584 40516608 40702464 40753856 40851456 40962636 41038848 41451696 41835508 42027414 42128064 42321312 42713176 43444566 43490304 43849728 43892992 44094336 44255744 44402688 44458752 44686512 44813824 45348864 45581184 45638736 45848088 45957888 46214256 46596192 47883264 48052323 48102912 48887808 49127936 49379616 49606128 49787712 50016096 50065444 50158592 50415552 50479208 51017472 51343578 51489856 51726048 51991038 52420716 52475904 52961792 53594112 53868672 54269952 54616848 54998784 55268928 56036552 56170752 56428416 56789109 57926088 58191804 58730617 58792448 59278336 59582016 60293376 60774912 60851648 61053696 61130784 61277184 61443954 61558272 61619008 62128256 62753262 63041121 63192096 64069764 64137216 65839488 66141504 66299904 66383616 66688128 67220736 68023296 68458104 68772132 68968064 69321384 69408911 69894288 71824896 72154368 72822464 73331712 73691904 74069424 74681568 74894336 75098166 75237888 75623328 75718812 77234784 77589072 78354432 79442688 80391168 81033216 81404928 81507712 81925272 82077696 82903392 83671016 84054828 84256128 84642624 85426352 86889132 86980608 87785984 88188672 88511488 88917504 89373024 89627648 91162368 91277472 91696176 91915776 92428512 93192384 94129893 95766528 96104646 96205824 98255872 98759232 99212256 99575424 100032192 100130888 100317184 100831104 100958416 102034944 102687156 102979712 103452096 103982076 104841432 105923584 107737344 109233696 109997568 110537856 112073104 112341504 112647249 112856832 113578218 115852176 116383608 117461234 117584896 118556672 119164032 120586752 121549824 121703296 122107392 122261568 122554368 122887908 123116544 123238016 124256512 125506524 126082242 126384192 128139528 131678976 132283008 132767232 133376256 134441472 136046592 136916208 137544264 137936128 138642768 138817822 139788576 143649792 144156969 144308736 145644928 146663424 147383808 148138848 149363136 149788672 150196332 150475776 151246656 151437624 154469568 155178144 158885376 160782336 162809856 163015424 163850544 165806784 167342032 168109656 168512256 169285248 170367327 170852704 173778264 175571968 176191851 176377344 177022976 177835008 178746048 179255296 182324736 182554944 183392352 183831552 184857024 186384768 188259786 189123363 192209292 192411648 196511744 197518464 198424512 199150848 200064384 200261776 201662208 201916832 204069888 205374312 205959424 206904192 207964152 208226733 209682864 211847168 215474688 218467392 219995136 221075712 224146208 224683008 225294498 225713664 227156436 231704352 232767216 234922468 235169792 238328064 241173504 243099648 243406592 244214784 244523136 245775816 246233088 246476032 248513024 251013048 252164484 252768384 256279056 263357952 264566016 265534464 266752512 268882944 273832416 275088528 275872256 277285536 277635644 279577152 282389679 287299584 288313938 288617472 291289856 294767616 296277696 298726272 300392664 300951552 302493312 302875248 308939136 310356288 317770752 326030848 327701088 331613568 334684064 336219312 337024512 337941747 338570496 340734654 341705408 347556528 351143936 352383702 352754688 355670016 357492096 364649472 365109888 366784704 367663104 369714048 372769536 376519572 378246726 384418584 395036928 396849024 398301696 400128768 400523552 403324416 403833664 408139776 410748624 411918848 413808384 415928304 416453466 419365728 430949376 436934784 439990272 442151424 448292416 449366016 450588996 451427328 454312872 463408704 465534432 469844936 476656128 482347008 486813184 488429568 489046272 491551632 492952064 497026048 502026096 504328968 505536768 512558112 526715904 528575553 529132032 531068928 533505024 537765888 547664832 550177056 551744512 554571072 555271288 559154304 564779358 576627876 577234944 582579712 589535232 592555392 597452544 600785328 604986624 605750496 617878272 620712576 624680199 635541504 652061696 655402176 663227136 669368128 672438624 674049024 675883494 677140992 681469308 683410816 695113056 704767404 705509376 714984192 729298944 730219776 733569408 739428096 745539072 753039144 756493452 763498021 768837168 790073856 793698048 796603392 800257536 801047104 806648832 807667328 821497248 823837696 827616768 831856608 832906932 838731456 861898752 873869568 884302848 896584832 901177992 902854656 908625744 926817408 931068864 939689872 953312256 973626368 978092544 983103264 985904128 994052096 1004052192 1008657936 1011073536 1025116224 1053431808 1057151106 1058264064 1067010048 1095329664 1100354112 1103489024 1109142144 1110542576 1118308608 1129558716 1153255752 1165159424 1185110784 1194905088 1201570656 1209973248 1211500992 1235756544 1241425152 1249360398 1304123392 1310804352 1326454272 1338736256 1344877248 1348098048 1351766988 1354281984 1362938616 1366821632 1390226112 1409534808 1429968384 1460439552 1467138816 1478856192 1491078144 1506078288 1512986904 1526996042 1537674336 1580147712 1585726659 1587396096 1593206784 1600515072 1602094208 1613297664 1615334656 1642994496 1647675392 1655233536 1663713216 1665813864 1677462912 1747739136 1768605696 1793169664 1802355984 1817251488 1853634816 1862137728 1874040597 1879379744 1906624512 1947252736 1956185088 1966206528 1971808256 2008104384 2017315872 2022147072 2050232448 2114302212 2116528128 2190659328 2200708224 2218284288 2221085152 2236617216 2259117432 2290494063 2306511504 2330318848 2370221568 2389810176 2403141312 2419946496 2423001984 2471513088 2482850304 2498720796 2621608704 2652908544 2677472512 2689754496 2703533976 2708563968 2725877232 2733643264 2780452224 2819069616 2859936768 2920879104 2934277632 2957712384 2982156288 3012156576 3025973808 3053992084 3075348672 3160295424 3171453318 3174792192 3201030144 3204188416 3230669312 3285988992 3310467072 3327426432 3331627728 3354925824 3495478272 3586339328 3604711968 3634502976 3707269632 3724275456 3748081194 3758759488 3912370176 3932413056 4016208768 4034631744 4044294144 4100464896 4228604424 4381318656 4401416448 4436568576 4442170304 4473234432 4518234864 4580988126 4613023008 4740443136 4779620352 4806282624 4839892992 4846003968 4943026176 4965700608 4997441592 5243217408 5305817088 5354945024 5379508992 5407067952 5451754464 5467286528 5560904448 5638139232 5719873536 5841758208 5868555264 5915424768 6024313152 6051947616 6107984168 6150697344 6342906636 6349584384 6408376832 6461338624 6571977984 6654852864 6663255456 6709851648 6871482189 6990956544 7172678656 7209423936 7269005952 7414539264 7448550912 7496162388 7517518976 7864826112 8032417536 8069263488 8200929792 8457208848 8762637312 8802832896 8873137152 8884340608 8946468864 9036469728 9161976252 9226046016 9480886272 9612565248 9692007936 9931401216 9994883184 10486434816 10709890048 10759017984 10814135904 10903508928 10934573056 11121808896 11276278464 11737110528 12048626304 12103895232 12215968336 12301394688 12685813272 12816753664 12922677248 13143955968 13309705728 13326510912 13419703296 13742964378 14345357312 14418847872 14538011904 14829078528 14897101824 14992324776 15035037952 15729652224 16064835072 16138526976 16401859584 16914417696 17525274624 17605665792 17746274304 17768681216 18072939456 18323952504 18452092032 19225130496 19384015872 19989766368 20614446567 20972869632 21419780096 21518035968 21628271808 21807017856 22243617792 22552556928 24097252608 24207790464 24431936672 24602789376 25371626544 25633507328 26287911936 26619411456 26653021824 26839406592 27485928756 28837695744 29076023808 29794203648 29984649552 30070075904 31459304448 32129670144 32277053952 32803719168 33828835392 35211331584 35537362432 36145878912 36647905008 36904184064 38450260992 38768031744 39979532736 41228893134 43036071936 43256543616 43614035712 44487235584 45105113856 48194505216 48415580928 48863873344 49205578752 50743253088 52575823872 53238822912 53306043648 54971857512 57675391488 58152047616 59969299104 60140151808 62918608896 64259340288 64554107904 67657670784 71074724864 72291757824 73295810016 73808368128 76900521984 79959065472 82457786268 86513087232 87228071424 90210227712 96389010432 96831161856 97727746688 98411157504 101486506176 106612087296 109943715024 115350782976 116304095232 119938598208 120280303616 129108215808 135315341568 142149449728 144583515648 146591620032 147616736256 159918130944 164915572536 173026174464 174456142848 180420455424 192778020864 193662323712 195455493376 202973012352 213224174592 219887430048 230701565952 239877196416 270630683136 289167031296 293183240064 295233472512 319836261888 329831145072 346052348928 348912285696 360840910848 387324647424 390910986752 405946024704 426448349184 439774860096 479754392832 541261366272 578334062592 586366480128 639672523776 659662290144 692104697856 781821973504 811892049408 879549720192 959508785664 1082522732544 1172732960256 1279345047552 1319324580288 1563643947008 1623784098816 1759099440384 1919017571328 2345465920512 2638649160576 3247568197632 3518198880768 3838035142656 4690931841024 5277298321152 7036397761536 10554596642304 14072795523072 21109193284608 42218386569216
- Sum of all divisors σ(n): 153925179408000
- Sum of proper divisors (its aliquot sum) s(n): 111706792838784
- 42218386569216 is an abundant number, because the sum of its proper divisors (111706792838784) is greater than itself. Its abundance is 69488406269568
Bases of 42218386569216
- Binary: 10011001100101101110111110111100111000000000002
- Hexadecimal: 0x2665BBEF3800
- Base-36: EYQUXBEO0
Squares and roots of 42218386569216
- 42218386569216 squared (422183865692162) is 1782392164507757934758854656
- 42218386569216 cubed (422183865692163) is 75249721419130162796660083376601427869696
-
The
square root of 42218386569216 is 6497567.7425645975 -
The
cube root of 42218386569216 is 34820.4097503161
Scales and comparisons
How big is 42218386569216?- 42,218,386,569,216 seconds is equal to 1,342,414 years, 5 weeks, 2 days, 10 hours, 33 minutes, 36 seconds.
-
To count from 1 to 42,218,386,569,216 would take you about three million, three hundred fifty-six thousand and thirty-five 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 42218386569216 cubic inches would be around 2901.7 feet tall.
Recreational maths with 42218386569216
- 42218386569216 backwards is 61296568381224
- The number of decimal digits it has is: 14
- The sum of 42218386569216's digits is 63
- More coming soon!
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 42218386569216 - Facts about the integer". Numbermatics.com. 2024. Web. 11 June 2024.
APA style:
Numbermatics. (2024). Number 42218386569216 - Facts about the integer. Retrieved 11 June 2024, from https://numbermatics.com/n/42218386569216/
Chicago style:
Numbermatics. 2024. "Number 42218386569216 - Facts about the integer". https://numbermatics.com/n/42218386569216/
The information we have on file for 42218386569216 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 42218386569216, math, Factors of 42218386569216, curriculum, school, college, exams, university, Prime factorization of 42218386569216, STEM, science, technology, engineering, physics, economics, calculator, forty-two trillion, two hundred eighteen billion, three hundred eighty-six million, five hundred sixty-nine thousand, two hundred sixteen.