1386808700655632384
1,386,808,700,655,632,384 is an even composite number composed of five prime numbers multiplied together.
1386808700655632384 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one thousand, eight hundred seventy-two divisors.
Prime factorization of 1386808700655632384:
225 × 133 × 192 × 31 × 412
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 13 × 13 × 13 × 19 × 19 × 31 × 41 × 41)See below for interesting mathematical facts about the number 1386808700655632384 from the Numbermatics database.
Names of 1386808700655632384
- Cardinal: 1386808700655632384 can be written as One quintillion, three hundred eighty-six quadrillion, eight hundred eight trillion, seven hundred billion, six hundred fifty-five million, six hundred thirty-two thousand, three hundred eighty-four.
Scientific notation
- Scientific notation: 1.386808700655632384 × 1018
Factors of 1386808700655632384
Divisors of 1386808700655632384
- Number of divisors d(n): 1872
-
Complete list of divisors:
1 2 4 8 13 16 19 26 31 32 38 41 52 62 64 76 82 104 124 128 152 164 169 208 247 248 256 304 328 338 361 403 416 494 496 512 533 589 608 656 676 722 779 806 832 988 992 1024 1066 1178 1216 1271 1312 1352 1444 1558 1612 1664 1681 1976 1984 2048 2132 2197 2356 2432 2542 2624 2704 2888 3116 3211 3224 3328 3362 3952 3968 4096 4264 4394 4693 4712 4864 5084 5239 5248 5408 5776 6232 6422 6448 6656 6724 6929 7657 7904 7936 8192 8528 8788 9386 9424 9728 10127 10168 10478 10496 10816 11191 11552 12464 12844 12896 13312 13448 13858 14801 15314 15808 15872 16384 16523 17056 17576 18772 18848 19456 20254 20336 20956 20992 21632 21853 22382 23104 24149 24928 25688 25792 26624 26896 27716 29602 30628 31616 31744 31939 32768 33046 34112 35152 37544 37696 38912 40508 40672 41743 41912 41984 43264 43706 44764 46208 48298 49856 51376 51584 52111 53248 53792 55432 59204 61009 61256 63232 63488 63878 65536 66092 68107 68224 70304 75088 75392 77824 81016 81344 83486 83824 83968 86528 87412 89528 90077 92416 96596 99541 99712 102752 103168 104222 106496 107584 110864 118408 122018 122512 126464 126976 127756 131072 131651 132184 136214 136448 140608 145483 150176 150784 155648 162032 162688 166972 167648 167936 173056 174824 179056 180154 184832 192413 193192 199082 199424 205504 206336 208444 212992 214799 215168 221728 236816 244036 245024 252928 253952 255512 262144 263302 264368 272428 272896 281216 284089 290966 300352 301568 311296 313937 324064 325376 333944 335296 335872 346112 349648 358112 360308 369664 384826 386384 398164 398848 411008 412672 415207 416888 425984 429598 430336 443456 458831 473632 488072 490048 505856 507904 511024 524288 526604 528736 544856 545792 562432 568178 581932 600704 603136 606841 622592 627874 648128 650752 667888 670592 671744 677443 692224 699296 716224 720616 739328 769652 772768 793117 796328 797696 822016 825344 830414 833776 851968 859196 860672 886912 917662 947264 976144 980096 990109 1011712 1015808 1022048 1048576 1053208 1057472 1089712 1091584 1124864 1136356 1163864 1201408 1206272 1213682 1245184 1255748 1294033 1296256 1301504 1335776 1341184 1343488 1354886 1384448 1398592 1432448 1441232 1478656 1539304 1545536 1586234 1592656 1595392 1644032 1650688 1660828 1667552 1703936 1711463 1718392 1721344 1773824 1835324 1891279 1894528 1952288 1960192 1980218 2023424 2031616 2044096 2097152 2106416 2114944 2179424 2183168 2249728 2272712 2327728 2402816 2412544 2427364 2490368 2501369 2511496 2588066 2592512 2603008 2671552 2682368 2686976 2709772 2768896 2792387 2797184 2864896 2882464 2957312 3078608 3091072 3172468 3185312 3190784 3288064 3301376 3321656 3335104 3407872 3422926 3436784 3442688 3547648 3670648 3693157 3782558 3789056 3904576 3920384 3960436 4046848 4063232 4081181 4088192 4194304 4212832 4229888 4358848 4366336 4499456 4545424 4655456 4805632 4825088 4854728 4980736 5002738 5022992 5176132 5185024 5206016 5343104 5364736 5373952 5397691 5419544 5537792 5584774 5594368 5729792 5764928 5914624 5964803 6157216 6182144 6344936 6370624 6381568 6576128 6602752 6643312 6670208 6815744 6845852 6873568 6885376 7095296 7341296 7386314 7565116 7578112 7809152 7840768 7888933 7920872 8093696 8126464 8162362 8176384 8388608 8425664 8459776 8717696 8732672 8806759 8998912 9090848 9310912 9611264 9650176 9709456 9961472 10005476 10045984 10352264 10370048 10412032 10686208 10729472 10747904 10795382 10839088 11075584 11169548 11188736 11459584 11529856 11829248 11929606 12314432 12364288 12689872 12741248 12763136 12871417 13152256 13205504 13286624 13340416 13631488 13691704 13747136 13770752 14190592 14682592 14772628 15130232 15156224 15618304 15681536 15777866 15841744 16187392 16252928 16324724 16352768 16777216 16851328 16919552 17435392 17465344 17613518 17997824 18181696 18621824 18812071 19222528 19300352 19418912 19922944 20010952 20091968 20704528 20740096 20824064 21372416 21458944 21495808 21590764 21678176 22151168 22339096 22377472 22919168 23059712 23658496 23859212 24586627 24628864 24728576 25379744 25482496 25526272 25742834 26304512 26411008 26573248 26680832 27262976 27383408 27494272 27541504 28381184 29365184 29545256 30260464 30312448 31236608 31363072 31555732 31683488 32374784 32505856 32517797 32649448 32705536 33554432 33702656 33839104 34870784 34930688 35227036 35995648 36363392 37243648 37624142 38445056 38600704 38837824 39845888 40021904 40183936 41409056 41480192 41648128 42744832 42917888 42991616 43181528 43356352 44302336 44678192 44754944 45838336 46119424 47316992 47718424 49173254 49257728 49457152 50759488 50964992 51052544 51485668 52609024 52822016 53055353 53146496 53361664 54525952 54766816 54988544 55083008 56762368 58730368 59090512 60520928 60624896 62473216 62726144 63111464 63366976 64749568 65011712 65035594 65298896 65411072 67405312 67678208 69741568 69861376 70169983 70454072 71991296 72726784 74487296 75248284 76890112 77201408 77542439 77675648 79691776 80043808 80367872 82818112 82960384 83296256 85489664 85835776 85983232 86363056 86712704 88604672 89356384 89509888 91676672 92238848 94633984 95436848 98346508 98515456 98914304 101518976 101929984 102105088 102556129 102971336 105218048 105644032 106110706 106292992 106723328 109051904 109533632 109977088 110166016 113524736 114487867 117460736 118181024 121041856 121249792 124946432 125452288 126222928 126733952 129499136 130023424 130071188 130597792 130822144 134810624 135356416 139483136 139722752 140339966 140908144 143982592 145453568 148974592 150496568 153780224 154402816 155084878 155351296 159383552 160087616 160735744 165636224 165920768 166592512 167328421 170979328 171671552 171966464 172726112 173425408 177209344 178712768 179019776 183353344 184477696 189267968 190873696 196693016 197030912 197828608 203037952 203859968 204210176 205112258 205942672 210436096 211288064 212221412 212585984 213446656 218103808 219067264 219954176 220332032 227049472 228975734 234921472 236362048 242083712 242499584 244556923 249892864 250904576 252445856 253467904 258998272 260046848 260142376 261195584 261644288 269621248 270712832 278966272 279445504 280679932 281816288 287965184 290907136 297949184 300993136 307560448 308805632 310169756 310702592 318767104 320175232 321471488 331272448 331841536 333185024 334656842 341958656 343343104 343932928 345452224 346850816 354418688 357425536 358039552 366706688 368955392 378535936 381747392 393386032 394061824 395657216 406075904 407719936 408420352 410224516 411885344 420872192 422576128 424442824 425171968 426893312 436207616 438134528 439908352 440664064 454098944 457951468 469842944 472724096 484167424 484999168 489113846 499785728 501809152 504891712 506935808 517996544 520093696 520284752 522391168 523288576 539242496 541425664 557932544 558891008 561359864 563632576 575930368 581814272 595898368 601986272 615120896 617611264 620339512 621405184 637534208 640350464 642942976 662544896 663683072 666370048 669313684 683917312 686686208 687865856 690904448 693701632 708837376 714851072 716079104 733413376 737910784 757071872 763494784 786772064 788123648 791314432 812151808 815439872 816840704 820449032 823770688 841744384 845152256 848885648 850343936 853786624 876269056 879816704 881328128 908197888 915902936 939685888 945448192 968334848 969998336 978227692 999571456 1003618304 1008051707 1009783424 1013871616 1035993088 1040187392 1040569504 1044782336 1046577152 1078484992 1082851328 1115865088 1117782016 1122719728 1127265152 1151860736 1163628544 1191796736 1203972544 1230241792 1235222528 1240679024 1242810368 1280700928 1285885952 1325089792 1327366144 1332740096 1333229677 1338627368 1367834624 1373372416 1375731712 1381808896 1387403264 1417674752 1429702144 1432158208 1466826752 1475821568 1514143744 1526989568 1573544128 1576247296 1582628864 1624303616 1630879744 1633681408 1640898064 1647541376 1683488768 1690304512 1697771296 1700687872 1707573248 1752538112 1759633408 1762656256 1816395776 1831805872 1879371776 1890896384 1936669696 1939996672 1956455384 1999142912 2007236608 2016103414 2019566848 2027743232 2071986176 2081139008 2089564672 2093154304 2156969984 2165702656 2175269473 2231730176 2235564032 2245439456 2254530304 2303721472 2327257088 2383593472 2407945088 2460483584 2470445056 2481358048 2485620736 2561401856 2571771904 2650179584 2654732288 2665480192 2666459354 2677254736 2735669248 2746744832 2763617792 2774806528 2835349504 2859404288 2864316416 2933653504 2951643136 3028287488 3053979136 3147088256 3152494592 3165257728 3179239999 3248607232 3261759488 3267362816 3281796128 3295082752 3366977536 3380609024 3395542592 3401375744 3415146496 3505076224 3519266816 3525312512 3632791552 3663611744 3758743552 3781792768 3873339392 3879993344 3912910768 3998285824 4014473216 4032206828 4039133696 4055486464 4143972352 4162278016 4179129344 4186308608 4313939968 4331405312 4350538946 4463460352 4471128064 4490878912 4509060608 4607442944 4654514176 4767186944 4815890176 4920967168 4940890112 4962716096 4971241472 5122803712 5143543808 5300359168 5309464576 5330960384 5332918708 5354509472 5471338496 5493489664 5527235584 5549613056 5670699008 5718808576 5728632832 5867307008 5903286272 6056574976 6107958272 6294176512 6304989184 6330515456 6358479998 6497214464 6523518976 6534725632 6563592256 6590165504 6733955072 6761218048 6791085184 6802751488 6830292992 7010152448 7038533632 7050625024 7265583104 7327223488 7517487104 7563585536 7746678784 7759986688 7825821536 7996571648 8028946432 8064413656 8078267392 8110972928 8287944704 8324556032 8358258688 8372617216 8627879936 8662810624 8701077892 8926920704 8942256128 8981757824 9018121216 9214885888 9309028352 9534373888 9631780352 9841934336 9881780224 9925432192 9942482944 10245607424 10287087616 10600718336 10618929152 10661920768 10665837416 10709018944 10942676992 10986979328 11054471168 11099226112 11437617152 11457265664 11734614016 11806572544 12113149952 12215916544 12588353024 12609978368 12661030912 12716959996 12994428928 13047037952 13069451264 13127184512 13180331008 13467910144 13522436096 13582170368 13605502976 13660585984 14020304896 14077067264 14101250048 14531166208 14654446976 15034974208 15127171072 15493357568 15519973376 15651643072 15993143296 16057892864 16128827312 16156534784 16221945856 16649112064 16716517376 16745234432 17255759872 17325621248 17402155784 17853841408 17884512256 17963515648 18036242432 18429771776 18618056704 19068747776 19263560704 19683868672 19763560448 19850864384 19884965888 20491214848 20574175232 21201436672 21237858304 21323841536 21331674832 21418037888 21885353984 21973958656 22108942336 22198452224 22875234304 22914531328 23469228032 23613145088 24431833088 25176706048 25219956736 25322061824 25433919992 25988857856 26094075904 26138902528 26254369024 26360662016 26935820288 27164340736 27211005952 27321171968 28040609792 28154134528 28202500096 29062332416 29308893952 30069948416 30254342144 30986715136 31039946752 31303286144 31986286592 32115785728 32257654624 32313069568 32443891712 33298224128 33433034752 33490468864 34511519744 34651242496 34804311568 35707682816 35927031296 36072484864 36859543552 37236113408 38137495552 38527121408 39367737344 39701728768 39769931776 40982429696 41148350464 41330119987 42402873344 42475716608 42647683072 42663349664 42836075776 43770707968 43947917312 44217884672 44396904448 45750468608 45829062656 46938456064 47226290176 48863666176 50353412096 50439913472 50644123648 50867839984 51977715712 52188151808 52508738048 52721324032 53871640576 54328681472 54422011904 54642343936 56081219584 56308269056 56405000192 58124664832 58617787904 60139896832 60508684288 61973430272 62079893504 62606572288 63972573184 64231571456 64515309248 64626139136 64887783424 66596448256 66866069504 66980937728 69023039488 69302484992 69608623136 71415365632 71854062592 72144969728 73719087104 74472226816 76274991104 77054242816 78735474688 79403457536 79539863552 81964859392 82296700928 82660239974 84805746688 84951433216 85326699328 85672151552 87541415936 87895834624 88435769344 88793808896 91500937216 91658125312 93876912128 94452580352 97727332352 100706824192 100879826944 101288247296 101735679968 103955431424 104376303616 105017476096 105442648064 107743281152 108657362944 108844023808 109284687872 112162439168 112616538112 116249329664 117235575808 120279793664 121017368576 123946860544 124159787008 125213144576 127945146368 128463142912 129030618496 129252278272 129775566848 133192896512 133732139008 133961875456 138046078976 138604969984 139217246272 142830731264 143708125184 144289939456 148944453632 152549982208 154108485632 157470949376 158806915072 159079727104 163929718784 164593401856 165320479948 169611493376 169902866432 170653398656 171344303104 175082831872 175791669248 176871538688 177587617792 183001874432 183316250624 187753824256 188905160704 195454664704 201413648384 201759653888 202576494592 203471359936 207910862848 208752607232 210034952192 210885296128 217314725888 217688047616 218569375744 224324878336 225233076224 232498659328 234471151616 240559587328 242034737152 247893721088 248319574016 250426289152 255890292736 256926285824 258061236992 258504556544 259551133696 266385793024 267464278016 267923750912 276092157952 277209939968 278434492544 285661462528 287416250368 288579878912 297888907264 305099964416 308216971264 317613830144 318159454208 327859437568 329186803712 330640959896 339222986752 339805732864 341306797312 342688606208 350165663744 353743077376 355175235584 366003748864 366632501248 375507648512 377810321408 390909329408 402827296768 403519307776 405152989184 406942719872 415821725696 417505214464 420069904384 421770592256 434629451776 435376095232 437138751488 448649756672 450466152448 468942303232 481119174656 484069474304 495787442176 496639148032 500852578304 511780585472 516122473984 517009113088 519102267392 532771586048 534928556032 535847501824 552184315904 554419879936 556868985088 571322925056 574832500736 577159757824 595777814528 610199928832 616433942528 635227660288 636318908416 655718875136 658373607424 661281919792 678445973504 682613594624 685377212416 700331327488 707486154752 710350471168 732007497728 733265002496 755620642816 781818658816 805654593536 807038615552 810305978368 813885439744 831643451392 835010428928 840139808768 843541184512 869258903552 870752190464 874277502976 897299513344 900932304896 937884606464 962238349312 968138948608 991574884352 1001705156608 1023561170944 1032244947968 1034018226176 1038204534784 1065543172096 1069857112064 1071695003648 1104368631808 1113737970176 1142645850112 1149665001472 1154319515648 1191555629056 1220399857664 1232867885056 1270455320576 1272637816832 1311437750272 1316747214848 1322563839584 1356891947008 1365227189248 1370754424832 1400662654976 1414972309504 1420700942336 1464014995456 1511241285632 1563637317632 1611309187072 1614077231104 1627770879488 1663286902784 1670020857856 1680279617536 1687082369024 1738517807104 1741504380928 1748555005952 1794599026688 1801864609792 1875769212928 1924476698624 1936277897216 1983149768704 2003410313216 2047122341888 2064489895936 2068036452352 2076409069568 2131086344192 2139714224128 2208737263616 2227475940352 2285291700224 2299330002944 2308639031296 2383111258112 2440799715328 2465735770112 2540910641152 2545275633664 2622875500544 2633494429696 2645127679168 2713783894016 2730454378496 2741508849664 2829944619008 2841401884672 2928029990912 3022482571264 3127274635264 3222618374144 3228154462208 3255541758976 3326573805568 3340041715712 3360559235072 3374164738048 3477035614208 3483008761856 3589198053376 3603729219584 3751538425856 3848953397248 3872555794432 3966299537408 4006820626432 4128979791872 4136072904704 4152818139136 4262172688384 4279428448256 4417474527232 4454951880704 4598660005888 4617278062592 4766222516224 4881599430656 4931471540224 5081821282304 5090551267328 5245751001088 5266988859392 5290255358336 5427567788032 5460908756992 5483017699328 5659889238016 5682803769344 5856059981824 6254549270528 6445236748288 6456308924416 6511083517952 6653147611136 6721118470144 6748329476096 6954071228416 6966017523712 7178396106752 7207458439168 7503076851712 7697906794496 7745111588864 7932599074816 8013641252864 8257959583744 8272145809408 8305636278272 8524345376768 8558856896512 8909903761408 9197320011776 9234556125184 9532445032448 9862943080448 10163642564608 10181102534656 10491502002176 10533977718784 10580510716672 10855135576064 10921817513984 10966035398656 11319778476032 11365607538688 11712119963648 12509098541056 12890473496576 13022167035904 13306295222272 13442236940288 13496658952192 13908142456832 13932035047424 14356792213504 15006153703424 15395813588992 15490223177728 15865198149632 16027282505728 16515919167488 16544291618816 16611272556544 17048690753536 17117713793024 17819807522816 18394640023552 18469112250368 19725886160896 20327285129216 20362205069312 20983004004352 21161021433344 21710271152128 21843635027968 21932070797312 22639556952064 22731215077376 23424239927296 25018197082112 25780946993152 26044334071808 26612590444544 26884473880576 26993317904384 27816284913664 28713584427008 30012307406848 30980446355456 31730396299264 32054565011456 33031838334976 33088583237632 33222545113088 34097381507072 34235427586048 35639615045632 36789280047104 36938224500736 39451772321792 40654570258432 41966008008704 42322042866688 43420542304256 43687270055936 43864141594624 45279113904128 46848479854592 50036394164224 51561893986304 52088668143616 53768947761152 53986635808768 55632569827328 57427168854016 60024614813696 61960892710912 63460792598528 64109130022912 66063676669952 66177166475264 68194763014144 68470855172096 71279230091264 73578560094208 73876449001472 78903544643584 81309140516864 83932016017408 84644085733376 87374540111872 87728283189248 90558227808256 93696959709184 100072788328448 103123787972608 104177336287232 107537895522304 107973271617536 111265139654656 120049229627392 123921785421824 128218260045824 132127353339904 132354332950528 136389526028288 136941710344192 142558460182528 147157120188416 147752898002944 157807089287168 162618281033728 169288171466752 174749080223744 175456566378496 181116455616512 200145576656896 206247575945216 208354672574464 215075791044608 215946543235072 222530279309312 240098459254784 256436520091648 264254706679808 264708665901056 272779052056576 285116920365056 294314240376832 295505796005888 315614178574336 325236562067456 338576342933504 349498160447488 350913132756992 412495151890432 416709345148928 430151582089216 431893086470144 445060558618624 480196918509568 512873040183296 528509413359616 545558104113152 570233840730112 588628480753664 631228357148672 650473124134912 677152685867008 698996320894976 701826265513984 824990303780864 833418690297856 860303164178432 890121117237248 960393837019136 1025746080366592 1057018826719232 1091116208226304 1140467681460224 1177256961507328 1300946248269824 1354305371734016 1397992641789952 1403652531027968 1666837380595712 1720606328356864 1780242234474496 1920787674038272 2051492160733184 2114037653438464 2280935362920448 2354513923014656 2601892496539648 2708610743468032 2795985283579904 2807305062055936 3333674761191424 3441212656713728 3841575348076544 4102984321466368 4228075306876928 4561870725840896 5417221486936064 5591970567159808 5614610124111872 6667349522382848 8205968642932736 8456150613753856 9123741451681792 10834442973872128 11183941134319616 13334699044765696 16912301227507712 18247482903363584 21668885947744256 22367882268639232 26669398089531392 33824602455015424 36494965806727168 43337771895488512 44735764537278464 53338796179062784 72989931613454336 86675543790977024 106677592358125568 173351087581954048 346702175163908096 693404350327816192 1386808700655632384
- Sum of all divisors σ(n): 3355189618084295040
- Sum of proper divisors (its aliquot sum) s(n): 1968380917428662656
- 1386808700655632384 is an abundant number, because the sum of its proper divisors (1968380917428662656) is greater than itself. Its abundance is 581572216773030272
Bases of 1386808700655632384
- Binary: 10011001111101110111100101010011001100000000000000000000000002
- Hexadecimal: 0x133EEF2A66000000
- Base-36: AJB2NLXQSPVK
Squares and roots of 1386808700655632384
- 1386808700655632384 squared (13868087006556323842) is 1923238372214163388695735422949523456
- 1386808700655632384 cubed (13868087006556323843) is 2667163708021377409639778838540682455616511575121199104
-
The
square root of 1386808700655632384 is 1177628422.1500567977 -
The
cube root of 1386808700655632384 is 1115164.2865315163
Scales and comparisons
How big is 1386808700655632384?- 1,386,808,700,655,632,384 seconds is equal to 44,096,226,999 years, 46 weeks, 16 hours, 59 minutes, 44 seconds.
-
To count from 1 to 1,386,808,700,655,632,384 would take you about one hundred fifty-four billion, three hundred thirty-six million, seven hundred ninety-four thousand, four hundred ninety-nine years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 1386808700655632384 cubic inches would be around 92930.4 feet tall.
Recreational maths with 1386808700655632384
- 1386808700655632384 backwards is 4832365560078086831
- The number of decimal digits it has is: 19
- The sum of 1386808700655632384's digits is 83
- 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 1386808700655632384 - Facts about the integer". Numbermatics.com. 2024. Web. 7 June 2024.
APA style:
Numbermatics. (2024). Number 1386808700655632384 - Facts about the integer. Retrieved 7 June 2024, from https://numbermatics.com/n/1386808700655632384/
Chicago style:
Numbermatics. 2024. "Number 1386808700655632384 - Facts about the integer". https://numbermatics.com/n/1386808700655632384/
The information we have on file for 1386808700655632384 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 1386808700655632384, math, Factors of 1386808700655632384, curriculum, school, college, exams, university, Prime factorization of 1386808700655632384, STEM, science, technology, engineering, physics, economics, calculator, one quintillion, three hundred eighty-six quadrillion, eight hundred eight trillion, seven hundred billion, six hundred fifty-five million, six hundred thirty-two thousand, three hundred eighty-four.