26611374569472
26,611,374,569,472 is an even composite number composed of six prime numbers multiplied together.
What does the number 26611374569472 look like?
This visualization shows the relationship between its 6 prime factors (large circles) and 2304 divisors.
26611374569472 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 26611374569472:
211 × 37 × 72 × 11 × 73 × 151
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 7 × 7 × 11 × 73 × 151)See below for interesting mathematical facts about the number 26611374569472 from the Numbermatics database.
Names of 26611374569472
- Cardinal: 26611374569472 can be written as Twenty-six trillion, six hundred eleven billion, three hundred seventy-four million, five hundred sixty-nine thousand, four hundred seventy-two.
Scientific notation
- Scientific notation: 2.6611374569472 × 1013
Factors of 26611374569472
Divisors of 26611374569472
- Number of divisors d(n): 2304
-
Complete list of divisors:
1 2 3 4 6 7 8 9 11 12 14 16 18 21 22 24 27 28 32 33 36 42 44 48 49 54 56 63 64 66 72 73 77 81 84 88 96 98 99 108 112 126 128 132 144 146 147 151 154 162 168 176 189 192 196 198 216 219 224 231 243 252 256 264 288 292 294 297 302 308 324 336 352 378 384 392 396 432 438 441 448 453 462 486 504 511 512 528 539 567 576 584 588 594 604 616 648 657 672 693 704 729 756 768 784 792 803 864 876 882 891 896 906 924 972 1008 1022 1024 1056 1057 1078 1134 1152 1168 1176 1188 1208 1232 1296 1314 1323 1344 1359 1386 1408 1458 1512 1533 1536 1568 1584 1606 1617 1661 1701 1728 1752 1764 1782 1792 1812 1848 1944 1971 2016 2044 2048 2079 2112 2114 2156 2187 2268 2304 2336 2352 2376 2409 2416 2464 2592 2628 2646 2673 2688 2718 2772 2816 2916 3024 3066 3072 3136 3168 3171 3212 3234 3322 3402 3456 3504 3528 3564 3577 3584 3624 3696 3888 3942 3969 4032 4077 4088 4158 4224 4228 4312 4374 4536 4599 4608 4672 4704 4752 4818 4832 4851 4928 4983 5103 5184 5256 5292 5346 5376 5436 5544 5621 5632 5832 5913 6048 6132 6144 6237 6272 6336 6342 6424 6468 6644 6804 6912 7008 7056 7128 7154 7168 7227 7248 7392 7399 7776 7884 7938 8019 8064 8154 8176 8316 8448 8456 8624 8748 9072 9198 9216 9344 9408 9504 9513 9636 9664 9702 9856 9966 10206 10368 10512 10584 10692 10731 10752 10872 11023 11088 11242 11264 11627 11664 11826 11907 12096 12231 12264 12474 12544 12672 12684 12848 12936 13288 13608 13797 13824 14016 14112 14256 14308 14336 14454 14496 14553 14784 14798 14949 15309 15552 15768 15876 16038 16128 16308 16352 16632 16863 16896 16912 17248 17496 17739 18144 18396 18432 18688 18711 18816 19008 19026 19272 19328 19404 19712 19932 20412 20736 21024 21168 21384 21462 21504 21681 21744 22046 22176 22197 22484 22528 23254 23328 23652 23814 24057 24192 24462 24528 24948 25088 25344 25368 25696 25872 26576 27216 27594 27648 28032 28224 28512 28539 28616 28908 28992 29106 29568 29596 29898 30618 31104 31536 31752 32076 32193 32256 32616 32704 33069 33264 33726 33792 33824 34496 34881 34992 35478 35721 36288 36693 36792 37376 37422 37632 38016 38052 38544 38656 38808 39347 39424 39864 40824 41391 41472 42048 42336 42768 42924 43008 43362 43488 43659 44092 44352 44394 44847 44968 46508 46656 47304 47628 48114 48384 48924 49056 49896 50176 50589 50688 50736 51392 51744 53152 53217 54432 55188 55296 56064 56133 56448 57024 57078 57232 57816 57984 58212 59136 59192 59796 61236 62208 63072 63504 64152 64386 64512 65043 65232 65408 66138 66528 66591 67452 67584 67648 68992 69762 69984 70956 71442 72576 73386 73584 74752 74844 75264 76032 76104 77088 77161 77312 77616 78694 78848 79728 81389 81648 82782 82944 84096 84672 85536 85617 85848 86724 86976 87318 88184 88704 88788 89694 89936 93016 93312 94608 95256 96228 96579 96768 97848 98112 99207 99792 100352 101178 101376 101472 102784 103488 104643 106304 106434 107163 108864 110079 110376 112128 112266 112896 114048 114156 114464 115632 115968 116424 118041 118272 118384 119592 121253 122472 124173 124416 126144 127008 128304 128772 129024 130086 130464 130816 130977 132276 133056 133182 134541 134904 135296 137984 139524 139968 141912 142884 145152 146772 147168 149504 149688 150528 151767 152064 152208 154176 154322 154624 155232 157388 157696 159456 159651 162778 163296 165564 165888 168192 168399 169344 171072 171234 171696 173448 173952 174636 176368 177408 177576 179388 179872 186032 186624 189216 190512 192456 193158 193536 195129 195696 196224 198414 199584 199773 202356 202752 202944 205568 206976 209286 212608 212868 214326 217728 220158 220752 224256 224532 225792 228096 228312 228928 231264 231483 231936 232848 236082 236544 236768 239184 242506 244167 244944 248346 248832 252288 254016 256608 256851 257544 260172 260928 261632 261954 264552 266112 266364 269082 269808 270592 275968 279048 279936 283824 285768 289737 290304 293544 294336 297621 299376 301056 303534 304128 304416 308352 308644 309248 310464 313929 314776 318912 319302 325556 326592 330237 331128 336384 336798 338688 342144 342468 343392 346896 347904 349272 352736 354123 354816 355152 358776 359744 363759 372064 372519 373248 378432 381024 384912 386316 387072 390258 391392 392448 392931 396828 399168 399546 403623 404712 405888 411136 413952 418572 425216 425736 428652 435456 440316 441504 448512 449064 451584 455301 456192 456624 457856 462528 462966 463872 465696 472164 473088 473536 478368 485012 488334 489888 496692 497664 504576 508032 513216 513702 515088 520344 521856 523264 523908 529104 532224 532728 538164 539616 540127 541184 551936 558096 559872 567648 571536 579474 580608 585387 587088 588672 595242 598752 599319 607068 608256 608832 616704 617288 620928 627858 629552 637824 638604 651112 653184 660474 662256 672768 673596 677376 684288 684936 686784 693792 694449 695808 698544 705472 708246 709632 710304 717552 719488 727518 732501 744128 745038 746496 756864 762048 769824 770553 772632 780516 782784 784896 785862 793656 798336 799092 807246 809424 811776 822272 827904 837144 848771 850432 851472 857304 869211 870912 880632 883008 892863 898128 903168 910602 912384 913248 915712 925056 925932 927744 931392 941787 944328 947072 956736 970024 976668 979776 993384 1009152 1016064 1026432 1027404 1030176 1040688 1043712 1046528 1047816 1058208 1062369 1064448 1065456 1076328 1079232 1080254 1082368 1091277 1103872 1116192 1117557 1119744 1135296 1143072 1158948 1161216 1170774 1174176 1177344 1178793 1190484 1197504 1198638 1210869 1214136 1217664 1233408 1234576 1241856 1255716 1259104 1275648 1277208 1302224 1306368 1320948 1324512 1345536 1347192 1354752 1365903 1368576 1369872 1373568 1387584 1388898 1391616 1397088 1410944 1416492 1419264 1420608 1435104 1438976 1455036 1465002 1488256 1490076 1492992 1513728 1524096 1539648 1541106 1545264 1561032 1565568 1569792 1571724 1587312 1596672 1598184 1614492 1618848 1620381 1623552 1644544 1655808 1674288 1697542 1700864 1702944 1714608 1738422 1741824 1756161 1761264 1766016 1785726 1796256 1797957 1821204 1824768 1826496 1831424 1850112 1851864 1862784 1883574 1888656 1894144 1913472 1940048 1953336 1959552 1986768 2018304 2032128 2052864 2054808 2060352 2081376 2083347 2087424 2095632 2116416 2124738 2128896 2130912 2152656 2158464 2160508 2164736 2182554 2197503 2232384 2235114 2239488 2270592 2286144 2311659 2317896 2341548 2348352 2354688 2357586 2380968 2395008 2397276 2421738 2428272 2435328 2466816 2469152 2483712 2511432 2518208 2546313 2551296 2554416 2604448 2607633 2612736 2641896 2649024 2678589 2694384 2709504 2731806 2737152 2739744 2747136 2775168 2777796 2783232 2794176 2821888 2825361 2832984 2841216 2870208 2877952 2910072 2930004 2976512 2980152 3027456 3048192 3079296 3082212 3090528 3122064 3131136 3139584 3143448 3174624 3187107 3193344 3196368 3228984 3237696 3240762 3247104 3273831 3311616 3348576 3395084 3401728 3405888 3429216 3476844 3483648 3512322 3522528 3532032 3571452 3592512 3595914 3632607 3642408 3652992 3662848 3700224 3703728 3725568 3767148 3777312 3788288 3826944 3880096 3906672 3919104 3973536 4036608 4064256 4097709 4105728 4109616 4120704 4162752 4166694 4174848 4191264 4232832 4249476 4257792 4261824 4305312 4316928 4321016 4365108 4395006 4464768 4470228 4478976 4541184 4572288 4623318 4635792 4683096 4696704 4709376 4715172 4761936 4790016 4794552 4843476 4856544 4861143 4870656 4933632 4938304 4967424 5022864 5036416 5092626 5102592 5108832 5208896 5215266 5225472 5283792 5298048 5357178 5388768 5393871 5463612 5474304 5479488 5494272 5550336 5555592 5588352 5643776 5650722 5665968 5682432 5740416 5755904 5820144 5860008 5941397 5953024 5960304 6054912 6096384 6158592 6164424 6181056 6244128 6250041 6262272 6286896 6349248 6374214 6386688 6392736 6457968 6475392 6481524 6494208 6547662 6592509 6697152 6790168 6811776 6858432 6953688 7024644 7045056 7064064 7142904 7185024 7191828 7265214 7284816 7305984 7325696 7400448 7407456 7451136 7534296 7554624 7576576 7638939 7653888 7760192 7813344 7822899 7838208 7947072 8035767 8128512 8195418 8211456 8219232 8241408 8325504 8333388 8349696 8382528 8465664 8476083 8498952 8523648 8610624 8633856 8642032 8730216 8790012 8929536 8940456 9082368 9144576 9246636 9271584 9366192 9393408 9418752 9430344 9523872 9561321 9580032 9589104 9686952 9713088 9722286 9741312 9821493 9876608 9934848 10045728 10072832 10185252 10205184 10217664 10417792 10430532 10450944 10567584 10596096 10714356 10777536 10787742 10927224 10958976 10988544 11100672 11111184 11176704 11287552 11301444 11331936 11364864 11480832 11511808 11640288 11720016 11882794 11906048 11920608 12109824 12192768 12293127 12317184 12328848 12362112 12488256 12500082 12524544 12573792 12698496 12748428 12773376 12785472 12915936 12950784 12963048 13095324 13185018 13394304 13580336 13623552 13716864 13907376 14049288 14090112 14128128 14285808 14370048 14383656 14530428 14569632 14583429 14611968 14800896 14814912 14902272 15068592 15109248 15153152 15277878 15307776 15520384 15626688 15645798 15676416 15894144 16071534 16181613 16390836 16422912 16438464 16482816 16651008 16666776 16765056 16931328 16952166 16997904 17047296 17221248 17267712 17284064 17460432 17580024 17824191 17859072 17880912 18164736 18289152 18493272 18543168 18732384 18750123 18786816 18860688 19047744 19122642 19160064 19178208 19373904 19426176 19444572 19482624 19642986 19753216 19777527 20091456 20145664 20370504 20435328 20835584 20861064 21135168 21192192 21428712 21555072 21575484 21854448 21917952 21977088 22201344 22222368 22353408 22575104 22602888 22663872 22729728 22916817 22961664 23280576 23440032 23765588 23812096 23841216 24107301 24385536 24586254 24634368 24657696 24724224 24976512 25000164 25049088 25147584 25396992 25428249 25496856 25570944 25831872 25901568 25926096 26190648 26370036 26788608 27160672 27247104 27433728 27814752 28098576 28180224 28256256 28571616 28683963 28740096 28767312 29060856 29139264 29166858 29223936 29464479 29629824 29804544 30137184 30218496 30555756 30615552 31040768 31253376 31291596 31352832 31788288 32143068 32363226 32781672 32876928 32965632 33302016 33333552 33530112 33862656 33904332 33995808 34094592 34442496 34535424 34568128 34920864 35160048 35648382 35718144 35761824 36329472 36578304 36986544 37086336 37464768 37500246 37573632 37721376 38095488 38245284 38320128 38356416 38747808 38852352 38889144 39285972 39506432 39555054 40182912 40291328 40741008 40870656 41671168 41722128 42270336 42384384 42857424 43110144 43150968 43708896 43750287 43835904 44402688 44444736 44706816 45205776 45327744 45459456 45833634 45923328 46561152 46880064 47531176 47682432 48214602 49172508 49268736 49315392 49448448 49953024 50000328 50295168 50793984 50856498 50993712 51141888 51663744 51803136 51852192 52381296 52740072 53472573 53577216 54321344 54494208 54867456 55629504 56197152 56250369 56360448 57143232 57367926 57480192 57534624 58121712 58278528 58333716 58447872 58928958 59259648 59332581 60274368 60436992 61111512 62081536 62506752 62583192 63576576 64286136 64726452 65563344 65753856 65931264 66604032 66667104 67060224 67725312 67808664 67991616 68189184 68750451 68884992 69136256 69841728 70320096 71296764 71436288 71523648 73156608 73973088 74172672 74929536 75000492 75147264 75442752 76190976 76490568 76712832 77495616 77704704 77778288 78571944 79012864 79110108 80365824 80582656 81482016 81741312 83342336 83444256 84540672 84768768 85714848 86051889 86220288 86301936 87417792 87500574 87671808 88393437 88889472 89413632 90411552 90655488 91667268 91846656 93122304 93760128 95062352 95364864 96429204 98345016 98630784 98896896 99906048 100000656 100590336 101587968 101712996 101987424 102283776 103327488 103606272 103704384 104762592 105480144 106945146 107154432 108642688 108988416 109734912 111259008 112394304 112500738 112720896 114286464 114735852 114960384 115069248 116243424 116557056 116667432 117857916 118519296 118665162 120548736 120873984 122223024 124163072 125013504 125166384 127153152 128572272 129452904 131126688 131250861 131507712 133208064 133334208 134120448 135617328 135983232 136378368 137500902 137769984 138272512 139683456 140640192 142593528 143047296 147946176 148345344 149859072 150000984 150885504 152381952 152981136 153425664 154991232 155409408 155556576 157143888 158025728 158220216 160417719 160731648 162964032 163482624 166684672 166888512 168751107 169081344 171429696 172103778 172440576 172603872 174835584 175001148 175343616 176786874 177778944 177997743 180823104 181310976 183334536 186244608 187520256 190124704 190729728 192858408 196690032 197261568 197793792 199812096 200001312 201180672 203175936 203425992 203974848 204567552 206251353 206654976 207408768 209525184 210960288 213890292 214308864 217285376 219469824 222518016 224788608 225001476 225441792 228572928 229471704 230138496 232486848 233114112 233334864 235715832 237038592 237330324 241097472 241747968 244446048 248326144 250027008 250332768 254306304 257144544 258905808 262253376 262501722 263015424 265180311 266668416 268240896 271234656 271966464 275001804 275539968 276545024 279366912 281280384 285187056 286094592 295892352 296690688 299718144 300001968 301771008 304763904 305962272 306851328 309982464 310818816 311113152 314287776 316440432 320835438 321463296 325928064 326965248 333777024 337502214 338162688 342859392 344207556 344881152 345207744 349671168 350002296 353573748 355557888 355995486 361646208 362621952 366669072 372489216 375040512 380249408 381459456 385716816 393380064 393752583 394523136 399624192 400002624 402361344 406851984 407949696 409135104 412502706 413309952 414817536 419050368 421920576 427780584 434570752 445036032 449577216 450002952 457145856 458943408 460276992 464973696 466228224 466669728 471431664 474077184 474660648 481253157 482194944 488892096 500054016 500665536 514289088 517811616 524506752 525003444 526030848 530360622 533336832 542469312 543932928 550003608 553090048 558733824 562560768 570374112 572189184 591784704 593381376 599436288 600003936 603542016 609527808 611924544 613702656 618754059 619964928 622226304 628575552 632880864 641670876 642926592 651856128 667554048 675004428 676325376 685718784 688415112 690415488 699342336 700004592 707147496 711115776 711990972 723292416 725243904 733338144 744978432 750081024 760498816 762918912 771433632 786760128 787505166 789046272 800005248 804722688 813703968 815899392 825005412 826619904 829635072 838100736 843841152 855561168 869141504 890072064 899154432 900005904 914291712 917886816 920553984 929947392 932456448 933339456 942863328 949321296 962506314 964389888 977784192 1001331072 1028578176 1035623232 1049013504 1050006888 1060721244 1066673664 1084938624 1087865856 1100007216 1106180096 1117467648 1125121536 1140748224 1144378368 1181257749 1183569408 1198872576 1200007872 1207084032 1223849088 1227405312 1237508118 1239929856 1244452608 1257151104 1265761728 1283341752 1303712256 1335108096 1350008856 1371437568 1376830224 1380830976 1398684672 1400009184 1414294992 1422231552 1423981944 1443759471 1446584832 1466676288 1500162048 1520997632 1542867264 1573520256 1575010332 1578092544 1600010496 1627407936 1631798784 1650010824 1659270144 1676201472 1687682304 1711122336 1738283008 1780144128 1798308864 1800011808 1828583424 1835773632 1841107968 1856262177 1859894784 1866678912 1885726656 1898642592 1925012628 1928779776 1955568384 2002662144 2057156352 2071246464 2098027008 2100013776 2121442488 2133347328 2169877248 2175731712 2200014432 2234935296 2250243072 2281496448 2288756736 2362515498 2367138816 2400015744 2414168064 2447698176 2475016236 2479859712 2488905216 2514302208 2531523456 2566683504 2607424512 2670216192 2700017712 2742875136 2753660448 2761661952 2797369344 2800018368 2828589984 2847963888 2887518942 2893169664 2933352576 3041995264 3085734528 3147040512 3150020664 3200020992 3254815872 3263597568 3300021648 3318540288 3352402944 3375364608 3422244672 3596617728 3600023616 3671547264 3682215936 3712524354 3719789568 3733357824 3771453312 3797285184 3850025256 3911136768 4005324288 4114312704 4142492928 4196054016 4200027552 4242884976 4266694656 4331278413 4339754496 4400028864 4500486144 4562992896 4725030996 4734277632 4800031488 4895396352 4950032472 4977810432 5028604416 5063046912 5133367008 5214849024 5340432384 5400035424 5485750272 5507320896 5523323904 5600036736 5657179968 5695927776 5775037884 5786339328 5866705152 6083990528 6171469056 6294081024 6300041328 6400041984 6509631744 6527195136 6600043296 6704805888 6750729216 6844489344 7200047232 7343094528 7425048708 7439579136 7466715648 7542906624 7594570368 7700050512 7822273536 8010648576 8228625408 8284985856 8392108032 8400055104 8485769952 8662556826 8679508992 8800057728 9125985792 9450061992 9600062976 9790792704 9900064944 9955620864 10057208832 10126093824 10266734016 10800070848 11014641792 11046647808 11200073472 11314359936 11391855552 11550075768 11733410304 12167981056 12342938112 12588162048 12600082656 12800083968 12993835239 13019263488 13200086592 13501458432 13688978688 14400094464 14686189056 14850097416 14933431296 15085813248 15189140736 15400101024 15644547072 16021297152 16457250816 16569971712 16800110208 16971539904 17325113652 17359017984 17600115456 18251971584 18900123984 19200125952 19581585408 19800129888 20114417664 20252187648 20533468032 21600141696 22029283584 22400146944 22628719872 22783711104 23100151536 23466820608 24685876224 25176324096 25200165312 25987670478 26038526976 26400173184 27377957376 28800188928 29372378112 29700194832 29866862592 30171626496 30378281472 30800202048 33139943424 33600220416 33943079808 34650227304 35200230912 36503943168 37800247968 38400251904 39600259776 40504375296 41066936064 43200283392 44058567168 44800293888 45257439744 45567422208 46200303072 46933641216 49371752448 50400330624 51975340956 52077053952 52800346368 54755914752 57600377856 58744756224 59400389664 60343252992 60756562944 61600404096 67200440832 67886159616 69300454608 70400461824 75600495936 79200519552 82133872128 86400566784 88117134336 89600587776 90514879488 91134844416 92400606144 100800661248 103950681912 105600692736 109511829504 115200755712 118800779328 121513125888 123200808192 134400881664 135772319232 138600909216 140800923648 151200991872 158401039104 164267744256 172801133568 176234268672 181029758976 182269688832 184801212288 201601322496 207901363824 211201385472 237601558656 246401616384 268801763328 271544638464 277201818432 302401983744 316802078208 328535488512 345602267136 364539377664 369602424576 403202644992 415802727648 422402770944 475203117312 492803232768 543089276928 554403636864 604803967488 633604156416 739204849152 806405289984 831605455296 950406234624 985606465536 1108807273728 1209607934976 1267208312832 1478409698304 1663210910592 1900812469248 2217614547456 2419215869952 2956819396608 3326421821184 3801624938496 4435229094912 6652843642368 8870458189824 13305687284736 26611374569472
- Sum of all divisors σ(n): 103337787571200
- Sum of proper divisors (its aliquot sum) s(n): 76726413001728
- 26611374569472 is an abundant number, because the sum of its proper divisors (76726413001728) is greater than itself. Its abundance is 50115038432256
Bases of 26611374569472
- Binary: 1100000110011111100011000011100111000000000002
- Hexadecimal: 0x1833F1873800
- Base-36: 9FL3HC000
Squares and roots of 26611374569472
- 26611374569472 squared (266113745694722) is 708165256476741073354358784
- 26611374569472 cubed (266113745694723) is 18845250897188763940516968656462621442048
-
The
square root of 26611374569472 is 5158621.3826440103 -
The
cube root of 26611374569472 is 29855.3685002025
Scales and comparisons
How big is 26611374569472?- 26,611,374,569,472 seconds is equal to 846,159 years, 20 weeks, 4 days, 11 hours, 31 minutes, 12 seconds.
-
To count from 1 to 26,611,374,569,472 would take you about two million, one hundred fifteen thousand, three hundred ninety-eight 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 26611374569472 cubic inches would be around 2487.9 feet tall.
Recreational maths with 26611374569472
- 26611374569472 backwards is 27496547311662
- 26611374569472 is a
Harshad number . - The number of decimal digits it has is: 14
- The sum of 26611374569472'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 26611374569472 - Facts about the integer". Numbermatics.com. 2024. Web. 19 June 2024.
APA style:
Numbermatics. (2024). Number 26611374569472 - Facts about the integer. Retrieved 19 June 2024, from https://numbermatics.com/n/26611374569472/
Chicago style:
Numbermatics. 2024. "Number 26611374569472 - Facts about the integer". https://numbermatics.com/n/26611374569472/
The information we have on file for 26611374569472 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 26611374569472, math, Factors of 26611374569472, curriculum, school, college, exams, university, Prime factorization of 26611374569472, STEM, science, technology, engineering, physics, economics, calculator, twenty-six trillion, six hundred eleven billion, three hundred seventy-four million, five hundred sixty-nine thousand, four hundred seventy-two.