44165139510240
44,165,139,510,240 is an even composite number composed of eight prime numbers multiplied together.
44165139510240 is an even composite number. It is composed of eight distinct prime numbers multiplied together. It has a total of two thousand, three hundred four divisors.
Prime factorization of 44165139510240:
25 × 32 × 5 × 73 × 41 × 43 × 67 × 757
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 7 × 7 × 7 × 41 × 43 × 67 × 757)See below for interesting mathematical facts about the number 44165139510240 from the Numbermatics database.
Names of 44165139510240
- Cardinal: 44165139510240 can be written as Forty-four trillion, one hundred sixty-five billion, one hundred thirty-nine million, five hundred ten thousand, two hundred forty.
Scientific notation
- Scientific notation: 4.416513951024 × 1013
Factors of 44165139510240
Divisors of 44165139510240
- 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 28 30 32 35 36 40 41 42 43 45 48 49 56 60 63 67 70 72 80 82 84 86 90 96 98 105 112 120 123 126 129 134 140 144 147 160 164 168 172 180 196 201 205 210 215 224 240 245 246 252 258 268 280 287 288 294 301 315 328 335 336 343 344 360 369 387 392 402 410 420 430 441 469 480 490 492 504 516 536 560 574 588 602 603 615 630 645 656 670 672 686 688 720 735 738 757 774 784 804 820 840 860 861 882 903 938 980 984 1005 1008 1029 1032 1072 1120 1148 1176 1204 1206 1230 1260 1290 1312 1340 1372 1376 1407 1435 1440 1470 1476 1505 1514 1548 1568 1608 1640 1680 1715 1720 1722 1763 1764 1806 1845 1876 1935 1960 1968 2009 2010 2016 2058 2064 2107 2144 2205 2271 2296 2345 2352 2408 2412 2460 2520 2580 2583 2680 2709 2744 2747 2814 2870 2881 2940 2952 3010 3015 3028 3087 3096 3216 3280 3283 3360 3430 3440 3444 3526 3528 3612 3690 3752 3785 3870 3920 3936 4018 4020 4116 4128 4214 4221 4305 4410 4515 4542 4592 4690 4704 4816 4824 4920 5040 5145 5160 5166 5289 5299 5360 5418 5488 5494 5628 5740 5762 5880 5904 6020 6027 6030 6056 6174 6192 6321 6432 6560 6566 6813 6860 6880 6888 7035 7052 7056 7224 7380 7504 7570 7740 7840 8036 8040 8232 8241 8428 8442 8610 8643 8815 8820 9030 9084 9184 9380 9632 9648 9840 9849 10045 10080 10290 10320 10332 10535 10578 10598 10720 10836 10976 10988 11256 11355 11480 11524 11760 11808 12040 12054 12060 12112 12341 12348 12384 12642 12915 13132 13545 13626 13720 13735 13776 14063 14070 14104 14112 14405 14448 14749 14760 15008 15140 15435 15480 15867 15897 16072 16080 16415 16464 16482 16856 16884 17220 17286 17630 17640 18060 18081 18168 18760 18963 19229 19296 19680 19698 20090 20167 20580 20640 20664 21070 21105 21156 21196 21672 21976 22512 22710 22960 22981 23048 23520 24080 24108 24120 24224 24682 24696 24723 25284 25830 25929 26264 26445 26495 27090 27252 27440 27470 27552 28126 28140 28208 28810 28896 29498 29520 29547 30135 30280 30870 30960 31037 31605 31734 31794 32144 32160 32551 32830 32928 32964 33712 33768 34065 34440 34572 35260 35280 36120 36162 36336 37023 37093 37520 37926 38458 39396 40180 40334 41160 41205 41328 42140 42189 42210 42312 42392 43215 43344 43952 44247 45024 45420 45920 45962 46096 47691 48160 48216 48240 49245 49364 49392 49446 50568 50719 51660 51858 52528 52890 52990 54180 54504 54880 54940 56252 56280 56416 57620 57687 58996 59040 59094 60270 60501 60560 61705 61740 61920 62074 63210 63468 63588 64288 65102 65660 65928 67424 67536 68130 68880 68943 69144 70315 70520 70560 72240 72324 72672 73745 74046 74186 75040 75852 76916 78792 79335 79485 80360 80668 82320 82410 82656 84280 84378 84420 84624 84784 86387 86430 86688 87904 88494 90405 90840 91924 92192 93111 94815 95382 96145 96432 96480 97653 98490 98728 98784 98892 100835 101136 101438 103320 103716 105056 105780 105980 108360 109008 109880 111069 111279 112504 112560 114905 115240 115374 117992 118121 118188 120540 121002 121120 123410 123480 123615 124148 126420 126567 126936 127176 129645 130204 131320 131856 132741 134603 135072 136260 137760 137886 138288 140630 141040 141169 144480 144648 147490 147735 148092 148372 151704 152157 153832 155185 157584 158670 158970 160720 161336 162755 164640 164820 168560 168756 168840 169248 169568 172774 172860 173061 176988 180810 181503 181680 183848 185115 185465 186222 189630 190764 192290 192864 195306 196980 197456 197784 201670 202272 202876 206640 206829 207432 210945 211560 211960 216720 217259 218016 219760 221235 222138 222558 225008 225120 227857 229810 230480 230748 235984 236242 236376 238455 241080 242004 246820 246960 247230 248296 252840 253134 253595 253872 254352 259161 259290 259651 260408 262640 263712 265482 269206 272520 275772 276576 279333 281260 282080 282338 288435 289296 292959 294980 295470 296184 296744 302505 303408 304314 307664 310370 315168 317340 317940 321440 322672 325510 329640 333837 337120 337512 337680 344715 345548 345720 346122 353976 354363 355033 361620 363006 363360 367696 370230 370930 372444 379260 381528 384580 390612 393960 394912 395568 403340 403809 405752 413280 413658 414864 421890 423120 423507 423920 431935 433440 434518 439520 442470 444276 445116 450016 455714 456471 459620 460960 461496 465555 471968 472484 472752 476910 482160 484008 488265 493640 493920 494460 496592 505680 506268 507190 507744 508704 518322 518580 519302 520816 525280 530964 538412 545040 551544 555345 556395 558666 562520 564676 576870 578592 585918 589960 590605 590940 592368 593488 604709 605010 606816 608628 615328 620740 632835 634680 635880 645344 651020 651777 659280 663705 667674 673015 675024 675360 683571 689430 691096 691440 692244 705845 707952 708726 710066 723240 726012 735392 740460 741860 744888 758520 760785 763056 769160 777483 778953 781224 787920 791136 806680 807618 811504 826847 827316 829728 843780 846240 847014 847840 863870 865305 869036 884940 888552 890232 907515 911428 912942 919240 922992 931110 942221 944968 945504 953820 964320 968016 976530 987280 988183 988920 993184 1011360 1012536 1014380 1034145 1036644 1037160 1038604 1041632 1061928 1063089 1065099 1076824 1086295 1090080 1103088 1110690 1112790 1117332 1125040 1129352 1139285 1153740 1171836 1179920 1181210 1181880 1184736 1186976 1209418 1210020 1211427 1217256 1241480 1265670 1269360 1270521 1271760 1295805 1298255 1302040 1303554 1318560 1327410 1334591 1335348 1346030 1350048 1367142 1378860 1382192 1382880 1384488 1396665 1411690 1415904 1417452 1420132 1446480 1452024 1464795 1480920 1483720 1489776 1517040 1520813 1521570 1526112 1538320 1554966 1557906 1562448 1575840 1594999 1613360 1615236 1623008 1653694 1654632 1669185 1687560 1694028 1727740 1730610 1738072 1769880 1771815 1775165 1777104 1780464 1814127 1815030 1822856 1825884 1838480 1845984 1862220 1884442 1889936 1907640 1936032 1953060 1955331 1974560 1976366 1977840 2019045 2025072 2028760 2050713 2068290 2073288 2074320 2077208 2079479 2117535 2123856 2126178 2130198 2153648 2172590 2180917 2206176 2221380 2225580 2234664 2250080 2258704 2278570 2282355 2307480 2336859 2343672 2359840 2362420 2363760 2418836 2420040 2422854 2434512 2480541 2482960 2485231 2531340 2538720 2541042 2543520 2591610 2596510 2604080 2607108 2654820 2669182 2670696 2692060 2734284 2757720 2764384 2768976 2793330 2823380 2826663 2834904 2840264 2892960 2904048 2929590 2961840 2964549 2967440 2979552 3023545 3034080 3041626 3043140 3076640 3109932 3115812 3124896 3189998 3195297 3226720 3230472 3258885 3307388 3309264 3338370 3375120 3388056 3417855 3455480 3461220 3476144 3539760 3543630 3550330 3554208 3560928 3628254 3630060 3645712 3651768 3676960 3724440 3768884 3779872 3815280 3887415 3894765 3906120 3910662 3952732 3955680 4003773 4038090 4050144 4057520 4101426 4134235 4136580 4146576 4148640 4154416 4158958 4235070 4247712 4252356 4260396 4307296 4345180 4361834 4442760 4451160 4469328 4517408 4557140 4562439 4564710 4614960 4673718 4687344 4711105 4724840 4727520 4784997 4837672 4840080 4845708 4869024 4940915 4961082 4965920 4970462 5062680 5082084 5183220 5193020 5208160 5214216 5309640 5315445 5325495 5338364 5341392 5384120 5442381 5468568 5515440 5537952 5586660 5646760 5653326 5669808 5680528 5787929 5808096 5859180 5923680 5929098 5934880 6047090 6057135 6083252 6086280 6219864 6231624 6238437 6352605 6379996 6390594 6460944 6517770 6542751 6614776 6618528 6672955 6676740 6750240 6776112 6835710 6910960 6922440 6952288 7079520 7087260 7100660 7256508 7260120 7291424 7303536 7441623 7448880 7455693 7537768 7604065 7630560 7774830 7789530 7812240 7821324 7905464 7974995 8007546 8076180 8115040 8202852 8268470 8273160 8293152 8308832 8317916 8470140 8479989 8504712 8520792 8690360 8723668 8885520 8893647 8902320 8938656 9070635 9114280 9124878 9129420 9229920 9342137 9347436 9374688 9422210 9449680 9569994 9675344 9680160 9691416 9776655 9881830 9922164 9940924 10125360 10164168 10253565 10366440 10386040 10397395 10428432 10619280 10630890 10645691 10650990 10676728 10682784 10768240 10884762 10904585 10937136 11030880 11164993 11173320 11293520 11306652 11339616 11361056 11575858 11684295 11718360 11858196 12011319 12094180 12114270 12166504 12172560 12402705 12426155 12439728 12463248 12476874 12705210 12759992 12781188 12921888 13035540 13085502 13229552 13345910 13353480 13552224 13671420 13687317 13821920 13844880 14133315 14174520 14201320 14354991 14513016 14520240 14556353 14607072 14822745 14883246 14897760 14911386 15075536 15208130 15266419 15549660 15579060 15624480 15642648 15810928 15949990 15976485 16015092 16152360 16405704 16536940 16546320 16635832 16940280 16959978 17009424 17041584 17363787 17380720 17396617 17447336 17771040 17787294 17804640 18141270 18228560 18249756 18258840 18684274 18694872 18715311 18844420 18899360 19139988 19350688 19382832 19553310 19628253 19763660 19844328 19881848 20018865 20250720 20328336 20507130 20732880 20772080 20794790 20856864 21238560 21261780 21291382 21301980 21353456 21536480 21769524 21809170 21874272 22329986 22346640 22367079 22587040 22613304 22812195 23151716 23368590 23436720 23716392 23924985 24022638 24188360 24228540 24333008 24345120 24805410 24852310 24879456 24926496 24953748 25410420 25519984 25562376 26071080 26171004 26459104 26691820 26706960 27211905 27342840 27374634 27689760 28026411 28266630 28349040 28402640 28709982 28939645 29026032 29040480 29112706 29645490 29766492 29822772 30151072 30416260 30532838 31099320 31158120 31192185 31285296 31621856 31899980 31937073 31952970 32030184 32304720 32713755 32811408 33073880 33092640 33271664 33494979 33880560 33919956 34018848 34083168 34727574 34761440 34793234 34894672 35574588 36282540 36457120 36499512 36517680 37208115 37278465 37368548 37389744 37430622 37688840 38279976 38765664 39106620 39256506 39527320 39688656 39763696 40037730 40515503 40656672 41014260 41465760 41544160 41589580 42399945 42523560 42582764 42603960 42706912 43539048 43618340 43669059 44468235 44659972 44693280 44734158 45226608 45624390 45799257 46303432 46710685 46737180 46873440 47432784 47849970 48045276 48376720 48457080 48666016 49610820 49704620 49907496 50820840 51039968 51124752 52091361 52142160 52189851 52342008 53228455 53383640 53413920 54423810 54685680 54749268 55824965 56052822 56533260 56698080 56805280 57419964 57879290 58052064 58225412 59290980 59532984 59645544 60056595 60832520 61065676 62198640 62316240 62384370 62570592 63799960 63874146 63905940 64060368 64609440 65394959 65427510 65622816 66147760 66543328 66989958 67761120 67839912 68436585 69455148 69586468 69789344 71149176 71774955 72565080 72781765 72999024 73035360 74416230 74556930 74737096 74779488 74861244 75377680 76332095 76559952 78213240 78513012 79054640 79377312 79527392 80075460 81031006 82028520 83179160 84079233 84799890 85047120 85165528 85207920 86818935 86983085 87078096 87236680 87338118 88936470 89319944 89417597 89468316 90453216 91248780 91598514 92606864 93421370 93474360 93576555 94865568 95699940 95811219 96090552 96753440 96914160 98141265 99221640 99409240 99814992 100484937 101641680 101894471 102249504 104182722 104284320 104379702 104684016 106456910 106767280 106864933 108847620 109371360 109498536 111649930 111835395 112105644 113066520 114839928 115758580 116450824 118581960 119065968 119291088 120113190 121546509 121665040 122131352 124397280 124632480 124768740 127599920 127748292 127811880 128120736 130789918 130855020 131007177 132295520 133979916 135679824 136873170 137397771 138910296 139172936 140132055 142298352 143549910 145130160 145563530 145998048 148832460 149113860 149474192 149722488 150755360 152664190 153119904 156426480 156569553 157026024 158109280 159685365 160150920 162062012 164057040 166358320 167474895 168158466 169599780 170094240 170331056 170415840 173637870 173966170 174156192 174473360 174676236 177872940 178639888 178835194 178936632 182497560 183197028 185213728 186842740 186948720 187153110 191399880 191622438 192181104 193828320 196184877 196282530 198443280 198818480 199629984 200969874 202577515 203283360 203788942 208365444 208759404 209368032 212913820 213534560 213729866 217695240 218345295 218997072 223299860 223670790 224211288 226133040 228996285 229679856 231517160 232901648 237163920 238131936 238582176 240226380 243093018 243330080 244262704 249537480 255199840 255496584 255623760 260456805 260949255 261579836 261710040 262014354 267959832 268252791 271359648 273746340 274795542 277820592 278345872 280264110 284596704 287099820 290260320 291127060 297664920 298227720 298948384 299444976 305328380 305683413 312852960 313139106 314052048 319370730 320301840 320594799 324124024 326974795 328114080 332716640 334949790 336316932 339199560 340662112 347275740 347932340 348946720 349352472 355745880 357279776 357670388 357873264 364639527 364995120 366394056 373685480 373897440 374306220 382799760 383244876 384362208 392369754 392565060 396886560 397636960 401939748 405155030 407577884 416730888 417518808 420396165 425827640 427459732 435390480 436690590 437994144 446599720 447087985 447341580 448422576 452266080 457764713 457992570 459359712 463034320 465803296 474327840 479056095 480452760 486186036 488525408 499074960 502424685 509472355 510993168 511247520 520913610 521898510 523159672 523420080 524028708 534324665 535919664 536505582 547492680 549591084 555641184 556691744 560528220 574199640 582254120 588554631 595329840 596455440 598889952 607732545 610656760 611366826 625923179 626278212 628104096 638741460 640603680 641189598 648248048 653949590 655035885 669899580 672633864 678399120 686988855 694551480 695864680 698704944 711491760 713261297 715340776 715746528 729279054 729990240 732788112 747370960 748054531 748612440 765599520 766489752 782847765 784739508 785130120 803879496 804758373 810310060 815155768 833461776 835037616 840792330 851655280 854919464 870780960 873381180 893199440 894175970 894683160 896845152 915529426 915985140 917050239 926068640 958112190 960905520 961784397 972372072 980924385 998149920 1004849370 1018944710 1021986336 1041827220 1043797020 1046319344 1046840160 1048057416 1068649330 1071839328 1073011164 1094985360 1099182168 1121056440 1148399280 1164508240 1177109262 1190659680 1192910880 1215465090 1221313520 1222733652 1251846358 1252556424 1277482920 1282379196 1296496096 1307899180 1310071770 1339799160 1341263955 1345267728 1356798240 1373294139 1373977710 1389102960 1391729360 1397409888 1422983520 1426522594 1430681552 1458558108 1465576224 1494741920 1496109062 1497224880 1528417065 1532979504 1565695530 1569479016 1570260240 1602973995 1607758992 1609516746 1620620120 1630311536 1666923552 1670075232 1681584660 1703310560 1709838928 1746762360 1786398880 1788351940 1789366320 1823197635 1831058852 1831970280 1834100478 1877769537 1916224380 1921811040 1923568794 1944744144 1961848770 2009698740 2037889420 2083654440 2087594040 2092638688 2096114832 2137298660 2139783891 2146022328 2189970720 2198364336 2242112880 2244163593 2288823565 2296798560 2329016480 2354218524 2430930180 2442627040 2445467304 2503692716 2505112848 2554965840 2564758392 2615798360 2620143540 2679598320 2682527910 2690535456 2746588278 2747955420 2778205920 2783458720 2853045188 2861363104 2917116216 2942773155 2992218124 2994449760 3056834130 3065959008 3129615895 3131391060 3138958032 3140520480 3205947990 3215517984 3219033492 3241240240 3260623072 3363169320 3419677856 3493524720 3566306485 3576703880 3578732640 3646395270 3662117704 3663940560 3668200956 3740272655 3755539074 3832448760 3847137588 3889488288 3923697540 4019397480 4023791865 4075778840 4119882417 4167308880 4175188080 4192229664 4274597320 4279567782 4292044656 4381462253 4396728672 4484225760 4488327186 4577647130 4585251195 4708437048 4808921985 4861860360 4890934608 5007385432 5010225696 5109931680 5129516784 5231596720 5240287080 5359196640 5365055820 5493176556 5495910840 5633308611 5706090376 5834232432 5885546310 5984436248 6113668260 6259231790 6262782120 6277916064 6411895980 6419351673 6438066984 6482480480 6726338640 6732490779 6866470695 6987049440 7132612970 7153407760 7292790540 7324235408 7327881120 7336401912 7480545310 7511078148 7664897520 7694275176 7847395080 8038794960 8047583730 8151557680 8239764834 8334617760 8350376160 8549194640 8559135564 8584089312 8762924506 8976654372 9155294260 9170502390 9388847685 9416874096 9617843970 9723720720 9781869216 10014770864 10259033568 10463193440 10480574160 10698919455 10730111640 10986353112 10991821680 11220817965 11266617222 11412180752 11668464864 11771092620 11968872496 12227336520 12518463580 12525564240 12823791960 12838703346 12876133968 13144386759 13452677280 13464981558 13732941390 14265225940 14306815520 14585581080 14648470816 14672803824 14961090620 15022156296 15329795040 15388550352 15694790160 16077589920 16095167460 16303115360 16479529668 17098389280 17118271128 17525849012 17953308744 18310588520 18341004780 18777695370 18833748192 19235687940 19447441440 20029541728 20599412085 20961148320 21397838910 21460223280 21907311265 21972706224 21983643360 22441635930 22533234444 22824361504 23542185240 23937744992 24454673040 25036927160 25051128480 25647583920 25677406692 25752267936 26288773518 26929963116 27465882780 28166543055 28530451880 29171162160 29345607648 29922181240 30044312592 30670235771 30777100704 31389580320 32096758365 32190334920 32959059336 33662453895 34236542256 35051698024 35906617488 36621177040 36682009560 37555390740 38471375880 39433160277 41198824170 42795677820 42920446560 43814622530 43945412448 44883271860 45066468888 47084370480 48909346080 50073854320 51295167840 51354813384 52577547036 53859926232 54931765560 56333086110 57060903760 58342324320 59844362480 60088625184 61340471542 64193516730 64380669840 65721933795 65918118672 67324907790 68473084512 70103396048 71813234976 73242354080 73364019120 75110781480 76942751760 78866320554 82397648340 85591355640 87629245060 89766543720 90132937776 92010707313 94168740960 100147708640 102709626768 105155094072 107719852464 109863531120 112666172220 114121807520 119688724960 122680943084 128387033460 128761339680 131443867590 131836237344 134649815580 140206792096 146728038240 150221562960 153351178855 153885503520 157732641108 164795296680 171182711280 175258490120 179533087440 180265875552 184021414626 197165801385 205419253536 210310188144 215439704928 219727062240 225332344440 245361886168 256774066920 262887735180 269299631160 276032121939 300443125920 306702357710 315465282216 329590593360 342365422560 350516980240 359066174880 368042829252 394331602770 420620376288 450664688880 460053536565 490723772336 513548133840 525775470360 538599262320 552064243878 613404715420 630930564432 659181186720 701033960480 736085658504 788663205540 901329377760 920107073130 981447544672 1027096267680 1051550940720 1077198524640 1104128487756 1226809430840 1261861128864 1380160609695 1472171317008 1577326411080 1840214146260 2103101881440 2208256975512 2453618861680 2760321219390 2944342634016 3154652822160 3680428292520 4416513951024 4907237723360 5520642438780 6309305644320 7360856585040 8833027902048 11041284877560 14721713170080 22082569755120 44165139510240
- Sum of all divisors σ(n): 187229910067200
- Sum of proper divisors (its aliquot sum) s(n): 143064770556960
- 44165139510240 is an abundant number, because the sum of its proper divisors (143064770556960) is greater than itself. Its abundance is 98899631046720
Bases of 44165139510240
- Binary: 10100000101010111111110111001110110011111000002
- Hexadecimal: 0x282AFF73B3E0
- Base-36: FNL6NR5K0
Squares and roots of 44165139510240
- 44165139510240 squared (441651395102402) is 1950559547958962307064857600
- 44165139510240 cubed (441651395102403) is 86146734558638240337861045475979341824000
-
The
square root of 44165139510240 is 6645685.7817865569 -
The
cube root of 44165139510240 is 35347.5948794661
Scales and comparisons
How big is 44165139510240?- 44,165,139,510,240 seconds is equal to 1,404,314 years, 42 weeks, 6 days, 4 hours, 24 minutes.
-
To count from 1 to 44,165,139,510,240 would take you about three million, five hundred ten thousand, seven hundred eighty-seven 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 44165139510240 cubic inches would be around 2945.6 feet tall.
Recreational maths with 44165139510240
- 44165139510240 backwards is 04201593156144
- 44165139510240 is a
Harshad number . - The number of decimal digits it has is: 14
- The sum of 44165139510240's digits is 45
- 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 44165139510240 - Facts about the integer". Numbermatics.com. 2024. Web. 2 June 2024.
APA style:
Numbermatics. (2024). Number 44165139510240 - Facts about the integer. Retrieved 2 June 2024, from https://numbermatics.com/n/44165139510240/
Chicago style:
Numbermatics. 2024. "Number 44165139510240 - Facts about the integer". https://numbermatics.com/n/44165139510240/
The information we have on file for 44165139510240 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 44165139510240, math, Factors of 44165139510240, curriculum, school, college, exams, university, Prime factorization of 44165139510240, STEM, science, technology, engineering, physics, economics, calculator, forty-four trillion, one hundred sixty-five billion, one hundred thirty-nine million, five hundred ten thousand, two hundred forty.