3036488136576000
3,036,488,136,576,000 is an even composite number composed of seven prime numbers multiplied together.
3036488136576000 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two thousand, one hundred twelve divisors.
Prime factorization of 3036488136576000:
210 × 3 × 53 × 53 × 972 × 101 × 157
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 5 × 5 × 53 × 97 × 97 × 101 × 157)See below for interesting mathematical facts about the number 3036488136576000 from the Numbermatics database.
Names of 3036488136576000
- Cardinal: 3036488136576000 can be written as Three quadrillion, thirty-six trillion, four hundred eighty-eight billion, one hundred thirty-six million, five hundred seventy-six thousand.
Scientific notation
- Scientific notation: 3.036488136576 × 1015
Factors of 3036488136576000
Divisors of 3036488136576000
- Number of divisors d(n): 2112
-
Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 32 40 48 50 53 60 64 75 80 96 97 100 101 106 120 125 128 150 157 159 160 192 194 200 202 212 240 250 256 265 291 300 303 314 318 320 375 384 388 400 404 424 471 480 485 500 505 512 530 582 600 606 628 636 640 750 768 776 785 795 800 808 848 942 960 970 1000 1010 1024 1060 1164 1200 1212 1256 1272 1280 1325 1455 1500 1515 1536 1552 1570 1590 1600 1616 1696 1884 1920 1940 2000 2020 2120 2328 2355 2400 2424 2425 2512 2525 2544 2560 2650 2910 3000 3030 3072 3104 3140 3180 3200 3232 3392 3768 3840 3880 3925 3975 4000 4040 4240 4656 4710 4800 4848 4850 5024 5050 5088 5120 5141 5300 5353 5820 6000 6060 6208 6280 6360 6400 6464 6625 6784 7275 7536 7575 7680 7760 7850 7950 8000 8080 8321 8480 9312 9409 9420 9600 9696 9700 9797 10048 10100 10176 10282 10600 10706 11640 11775 12000 12120 12125 12416 12560 12625 12720 12800 12928 13250 13568 14550 15072 15150 15229 15360 15423 15520 15700 15857 15900 16000 16059 16160 16642 16960 18624 18818 18840 19200 19392 19400 19594 19625 19875 20096 20200 20352 20564 21200 21412 23280 23550 24000 24240 24250 24832 24963 25120 25250 25440 25600 25705 25856 26500 26765 27136 28227 29100 29391 30144 30300 30458 30846 31040 31400 31714 31800 32000 32118 32320 33284 33920 36375 37248 37636 37680 37875 38400 38784 38800 39188 39250 39750 40192 40400 40704 41128 41605 42400 42824 45687 46560 47045 47100 47571 48000 48480 48500 48985 49664 49926 50240 50500 50880 51410 51712 53000 53530 54272 56454 58200 58782 58875 60288 60600 60916 61692 62080 62800 63428 63600 64000 64236 64640 66568 67840 72750 74496 75272 75360 75750 76145 76800 77115 77568 77600 78376 78500 79285 79500 80295 80384 80800 81408 82256 83210 84800 85648 91374 93120 94090 94200 95142 96000 96960 97000 97970 99328 99852 100480 101000 101760 102820 103424 106000 107060 112908 116400 117564 117750 120576 121200 121832 123384 124160 124815 125600 126856 127200 128000 128472 128525 129280 133136 133825 135680 141135 145500 146955 148992 150544 150720 151500 152290 154230 155136 155200 156752 157000 158570 159000 160590 160768 161600 162816 164512 166420 169600 171296 182748 186240 188180 188400 190284 192000 193920 194000 195940 199704 200960 202000 203520 205640 208025 212000 214120 225816 228435 232800 235128 235225 235500 237855 241152 242400 243664 244925 246768 248320 249630 251200 253712 254400 256944 257050 258560 266272 267650 271360 282270 291000 293910 297984 301088 301440 303000 304580 308460 310272 310400 313504 314000 317140 318000 321180 323200 329024 332840 339200 342592 365496 372480 376360 376800 380568 380725 384000 385575 387840 388000 391880 396425 399408 401475 401920 404000 407040 411280 416050 424000 428240 451632 456870 465600 470256 470450 471000 475710 482304 484800 487328 489850 493536 496640 498677 499260 502400 507424 508800 513888 514100 517120 519241 532544 535300 564540 582000 587820 602176 602880 606000 609160 616920 620800 624075 627008 628000 634280 636000 642360 642625 646400 658048 665680 669125 678400 685184 705675 730992 734775 744960 752720 753600 761136 761450 771150 775680 776000 783760 792850 798816 802950 803840 807137 808000 814080 822560 832100 840421 848000 856480 903264 913740 931200 940512 940900 942000 950309 951420 969600 974656 979700 987072 997354 998520 1004800 1014848 1017600 1027776 1028200 1038482 1040125 1065088 1070600 1129080 1142175 1164000 1175640 1176125 1189275 1204352 1205760 1212000 1218320 1224625 1233840 1241600 1248150 1254016 1256000 1268560 1272000 1284720 1285250 1292800 1316096 1331360 1338250 1356800 1370368 1411350 1461984 1469550 1477213 1489920 1496031 1505440 1507200 1522272 1522900 1538129 1542300 1551360 1552000 1557723 1567520 1585700 1597632 1605900 1614274 1616000 1645120 1664200 1680842 1696000 1712960 1806528 1827480 1862400 1881024 1881800 1884000 1900618 1902840 1903625 1927875 1939200 1949312 1959400 1974144 1982125 1994708 1997040 2007375 2009600 2029696 2035200 2055552 2056400 2076964 2080250 2130176 2141200 2258160 2284350 2328000 2351280 2352250 2378550 2408704 2411520 2421411 2424000 2436640 2449250 2467680 2483200 2493385 2496300 2508032 2512000 2521263 2537120 2544000 2569440 2570500 2585600 2596205 2632192 2662720 2676500 2740736 2822700 2850927 2923968 2939100 2954426 2992062 3010880 3014400 3044544 3045800 3076258 3084600 3104000 3115446 3120375 3135040 3171400 3195264 3211800 3228548 3232000 3290240 3328400 3361684 3392000 3425920 3528375 3613056 3654960 3673875 3724800 3762048 3763600 3768000 3801236 3805680 3807250 3855750 3878400 3898624 3918800 3948288 3964250 3989416 3994080 4014750 4019200 4035685 4059392 4070400 4111104 4112800 4153928 4160500 4202105 4260352 4282400 4431639 4516320 4568700 4614387 4656000 4702560 4704500 4751545 4757100 4817408 4842822 4848000 4873280 4898500 4935360 4986770 4992600 5016064 5024000 5042526 5074240 5088000 5138880 5141000 5192410 5264384 5325440 5353000 5481472 5645400 5701854 5710875 5847936 5878200 5908852 5946375 5984124 6021760 6028800 6089088 6091600 6152516 6169200 6208000 6230892 6240750 6270080 6342800 6390528 6423600 6457096 6464000 6580480 6656800 6723368 6784000 6851840 7056750 7226112 7309920 7347750 7386065 7449600 7480155 7524096 7527200 7536000 7602472 7611360 7614500 7690645 7711500 7756800 7788615 7797248 7837600 7896576 7928500 7978832 7988160 8029500 8071370 8118784 8222208 8225600 8307856 8321000 8404210 8520704 8564800 8863278 9032640 9137400 9228774 9312000 9405120 9409000 9503090 9514200 9634816 9685644 9696000 9746560 9797000 9870720 9973540 9985200 10032128 10048000 10085052 10148480 10176000 10277760 10282000 10384820 10650880 10706000 11290800 11403708 11421750 11695872 11756400 11817704 11892750 11968248 12043520 12057600 12107055 12178176 12183200 12305032 12338400 12416000 12461784 12466925 12481500 12540160 12606315 12685600 12781056 12847200 12914192 12928000 12981025 13160960 13313600 13446736 13703680 14113500 14254635 14452224 14619840 14695500 14772130 14960310 15048192 15054400 15072000 15204944 15222720 15229000 15381290 15423000 15577230 15594496 15675200 15793152 15857000 15957664 15976320 16059000 16142740 16237568 16444416 16451200 16615712 16642000 16808420 17129600 17726556 18065280 18274800 18457548 18624000 18810240 18818000 19006180 19028400 19371288 19392000 19493120 19594000 19741440 19947080 19970400 20096000 20170104 20178425 20296960 20352000 20555520 20564000 20769640 21010525 21301760 21412000 22158195 22581600 22807416 22843500 23071935 23391744 23512800 23635408 23757725 23785500 23936496 24087040 24214110 24356352 24366400 24610064 24676800 24923568 24933850 24963000 25080320 25212630 25371200 25562112 25694400 25828384 25962050 26321920 26627200 26893472 27407360 28227000 28509270 28904448 29239680 29391000 29544260 29920620 30096384 30108800 30144000 30409888 30445440 30458000 30762580 30846000 31154460 31350400 31714000 31915328 31952640 32118000 32285480 32902400 33231424 33284000 33616840 34259200 35453112 36130560 36549600 36915096 36930325 37248000 37400775 37620480 37636000 38012360 38056800 38453225 38742576 38784000 38943075 38986240 39188000 39482880 39894160 39940800 40340208 40356850 40593920 41111040 41128000 41539280 42021050 42603520 42824000 44316390 45163200 45614832 45687000 46143870 46783488 47025600 47270816 47515450 47571000 47872992 48174080 48428220 48712704 48732800 49220128 49353600 49847136 49867700 49926000 50160640 50366377 50425260 50742400 51388800 51656768 51924100 53254400 53786944 56454000 57018540 58479360 58782000 59088520 59841240 60217600 60288000 60535275 60819776 60890880 60916000 61525160 61692000 62308920 62334625 62700800 63031575 63428000 63830656 63905280 64236000 64570960 64905125 65804800 66462848 66568000 67233680 68518400 70906224 71273175 72261120 73099200 73830192 73860650 74801550 75240960 75272000 76024720 76113600 76906450 77485152 77886150 77972480 78292289 78376000 78965760 79788320 79881600 80680416 80713700 81187840 81520837 82222080 82256000 83078560 84042100 85648000 88632780 90326400 91229664 91374000 92287740 94051200 94541632 95030900 95142000 95745984 96856440 97465600 98440256 98707200 99694272 99735400 99852000 100732754 100850520 100892125 101484800 102777600 103313536 103848200 105052625 106508800 107573888 110790975 112908000 114037080 115359675 116958720 117564000 118177040 118788625 119682480 120435200 121070550 121639552 121781760 121832000 123050320 123384000 124617840 124669250 125401600 126063150 126856000 127661312 127810560 128472000 129141920 129810250 131609600 132925696 133136000 134467360 137036800 141812448 142546350 144522240 146198400 147660384 147721300 149198513 149603100 150481920 150544000 151099131 152049440 152227200 153812900 154970304 155772300 156584578 156752000 159576640 159763200 161360832 161427400 163041674 164512000 166157120 168084200 171296000 177265560 180652800 182459328 182748000 184575480 184651625 187003875 188102400 189083264 190061800 190284000 191491968 192266125 193712880 194715375 194931200 196880512 197414400 199388544 199470800 199704000 201465508 201701040 201784250 202969600 205555200 206627072 207696400 210105250 213017600 215147776 221581950 225816000 228074160 230719350 233917440 234876867 235128000 236354080 237577250 239364960 240870400 242141100 243279104 243563520 243664000 244562511 246100640 246768000 249235680 249338500 250803200 251831885 252126300 253712000 255322624 256944000 258283840 259620500 265851392 266272000 268934720 283624896 285092700 292396800 295320768 295442600 298397026 299206200 301088000 302198262 302676375 304098880 304454400 307625800 309940608 311544600 313169156 313504000 315157875 319153280 319526400 322721664 322854800 326083348 329024000 332314240 336168400 342592000 354531120 356365875 361305600 364918656 365496000 369150960 369303250 374007750 376204800 378166528 380123600 380568000 382983936 384532250 387425760 389430750 389862400 391461445 393761024 394828800 398777088 398941600 399408000 402931016 403402080 403568500 405939200 407604185 411110400 413254144 415392800 420210500 430295552 443163900 447595539 451632000 456148320 461438700 469753734 470256000 472708160 475154500 478729920 484282200 486558208 487328000 489125022 492201280 493536000 498471360 498677000 503663770 504252600 507424000 510645248 513888000 516567680 519241000 531702784 532544000 537869440 553954875 567249792 570185400 576798375 584793600 590641536 590885200 596794052 598412400 602176000 604396524 605352750 608197760 608908800 615251600 619881216 623089200 626338312 627008000 630315750 638306560 639052800 645443328 645709600 652166696 658048000 664628480 672336800 685184000 709062240 712731750 722611200 729837312 730992000 738301920 738606500 745992565 748015500 752409600 755495655 756333056 760247200 761136000 765967872 769064500 774851520 778861500 782922890 787522048 797554176 797883200 798816000 805862032 806804160 807137000 815208370 826508288 830785600 840421000 860591104 886327800 895191078 903264000 912296640 922877400 939507468 940512000 945416320 950309000 957459840 968564400 973116416 974656000 978250044 984402560 987072000 996942720 997354000 1007327540 1008505200 1014848000 1027776000 1033135360 1038482000 1065088000 1075738880 1107909750 1134499584 1140370800 1153596750 1169587200 1174384335 1181283072 1181770400 1193588104 1196824800 1204352000 1208793048 1210705500 1216395520 1217817600 1222812555 1230503200 1239762432 1246178400 1252676624 1254016000 1259159425 1260631500 1276613120 1290886656 1291419200 1304333392 1329256960 1344673600 1418124480 1425463500 1459674624 1461984000 1476603840 1477213000 1491985130 1496031000 1510991310 1512666112 1520494400 1522272000 1531935744 1538129000 1549703040 1557723000 1565845780 1575044096 1595108352 1595766400 1597632000 1611724064 1613608320 1614274000 1630416740 1661571200 1680842000 1772655600 1790382156 1806528000 1824593280 1845754800 1879014936 1881024000 1890832640 1900618000 1914919680 1937128800 1949312000 1956500088 1957307225 1968805120 1974144000 1993885440 1994708000 2014655080 2017010400 2029696000 2038020925 2055552000 2066270720 2076964000 2151477760 2215819500 2237977695 2268999168 2280741600 2307193500 2348768670 2362566144 2363540800 2387176208 2393649600 2417586096 2421411000 2432791040 2445625110 2461006400 2479524864 2492356800 2505353248 2518318850 2521263000 2553226240 2581773312 2582838400 2608666784 2658513920 2689347200 2836248960 2850927000 2919349248 2923968000 2953207680 2954426000 2983970260 2992062000 3021982620 3040988800 3044544000 3076258000 3099406080 3115446000 3131691560 3191532800 3195264000 3223448128 3227216640 3228548000 3260833480 3323142400 3361684000 3545311200 3580764312 3613056000 3649186560 3691509600 3729962825 3758029872 3762048000 3777478275 3781665280 3801236000 3829839360 3874257600 3913000176 3914614450 3937610240 3987770880 3989416000 4029310160 4034020800 4076041850 4132541440 4153928000 4302955520 4431639000 4475955390 4537998336 4561483200 4614387000 4697537340 4725132288 4727081600 4774352416 4787299200 4835172192 4842822000 4865582080 4891250220 4922012800 4984713600 5010706496 5036637700 5042526000 5165676800 5217333568 5378694400 5672497920 5701854000 5847936000 5871921675 5906415360 5908852000 5967940520 5984124000 6043965240 6081977600 6089088000 6114062775 6152516000 6198812160 6230892000 6263383120 6295797125 6383065600 6446896256 6454433280 6457096000 6521666960 6646284800 6723368000 7090622400 7161528624 7298373120 7383019200 7459925650 7516059744 7554956550 7563330560 7602472000 7659678720 7748515200 7826000352 7829228900 7875220480 7907521189 7975541760 7978832000 8058620320 8068041600 8152083700 8307856000 8863278000 8951910780 9122966400 9228774000 9395074680 9454163200 9548704832 9574598400 9670344384 9685644000 9782500440 9786536125 9844025600 9969427200 10021412992 10073275400 10085052000 10190104625 10331353600 10434667136 10757388800 11189888475 11344995840 11403708000 11743843350 11812830720 11817704000 11935881040 11968248000 12087930480 12163955200 12228125550 12305032000 12397624320 12461784000 12526766240 12591594250 12766131200 12893792512 12908866560 12914192000 13043333920 13292569600 13446736000 14181244800 14323057248 14596746240 14766038400 14919851300 15032119488 15109913100 15204944000 15497030400 15652000704 15658457800 15815042378 15957664000 16117240640 16136083200 16304167400 16615712000 17726556000 17903821560 18245932800 18457548000 18649814125 18790149360 18887391375 18908326400 19097409664 19149196800 19340688768 19371288000 19565000880 19573072250 19688051200 19938854400 20042825984 20146550800 20170104000 20380209250 20662707200 20869334272 21514777600 22379776950 22689991680 22807416000 23487686700 23625661440 23635408000 23722563567 23871762080 23936496000 24175860960 24327910400 24456251100 24610064000 24923568000 25053532480 25183188500 25787585024 25828384000 26086667840 26893472000 28362489600 28646114496 29359608375 29532076800 29839702600 30064238976 30219826200 30409888000 30570313875 30994060800 31304001408 31316915600 31630084756 31915328000 32234481280 32272166400 32608334800 33231424000 35453112000 35807643120 36491865600 36915096000 37299628250 37580298720 37774782750 37816652800 38194819328 38298393600 38681377536 38742576000 39130001760 39146144500 39376102400 39537605945 39877708800 40085651968 40293101600 40340208000 40760418500 41738668544 44759553900 45614832000 46975373400 47270816000 47445127134 47743524160 47872992000 48351721920 48912502200 49220128000 49847136000 50107064960 50366377000 51575170048 51656768000 52173335680 53786944000 55949442375 56724979200 57292228992 58719216750 59064153600 59679405200 60128477952 60439652400 60819776000 61140627750 61988121600 62608002816 62633831200 63260169512 63830656000 64468962560 64544332800 65216669600 66462848000 70906224000 71615286240 72983731200 73830192000 74599256500 75160597440 75549565500 76389638656 77362755072 77485152000 78260003520 78292289000 79075211890 80171303936 80586203200 80680416000 81520837000 83477337088 89519107800 91229664000 93950746800 94541632000 94890254268 95487048320 95745984000 96703443840 97825004400 98440256000 99694272000 100214129920 100732754000 103313536000 104346671360 107573888000 111898884750 113449958400 114584457984 117438433500 118128307200 118612817835 119358810400 120256955904 120879304800 121639552000 122281255500 125216005632 125267662400 126520339024 128937925120 130433339200 141812448000 143230572480 147660384000 149198513000 150321194880 151099131000 152779277312 154725510144 154970304000 156520007040 156584578000 158150423780 161172406400 161360832000 163041674000 179038215600 182459328000 187901493600 189083264000 189780508536 190974096640 191491968000 193406887680 195650008800 196880512000 197688029725 199388544000 200428259840 201465508000 208693342720 223797769500 229168915968 234876867000 237225635670 238717620800 240513911808 241758609600 244562511000 250432011264 250535324800 253040678048 257875850240 260866678400 283624896000 286461144960 295320768000 298397026000 300642389760 302198262000 309940608000 313040014080 313169156000 316300847560 322344812800 322721664000 326083348000 358076431200 364918656000 375802987200 379561017072 381948193280 386813775360 391300017600 395376059450 400856519680 402931016000 417386685440 447595539000 458337831936 469753734000 474451271340 477435241600 483517219200 489125022000 501070649600 506081356096 521733356800 567249792000 572922289920 590641536000 593064089175 596794052000 601284779520 604396524000 626080028160 626338312000 632601695120 644689625600 652166696000 716152862400 751605974400 759122034144 763896386560 773627550720 782600035200 790752118900 805862032000 895191078000 939507468000 948902542680 954870483200 967034438400 978250044000 988440148625 1002141299200 1012162712192 1043466713600 1145844579840 1186128178350 1193588104000 1202569559040 1208793048000 1252160056320 1252676624000 1265203390240 1289379251200 1304333392000 1432305724800 1503211948800 1518244068288 1565200070400 1581504237800 1611724064000 1790382156000 1879014936000 1897805085360 1909740966400 1934068876800 1956500088000 1976880297250 2004282598400 2024325424384 2086933427200 2291689159680 2372256356700 2387176208000 2417586096000 2505353248000 2530406780480 2608666784000 2864611449600 2965320445875 3006423897600 3036488136576 3130400140800 3163008475600 3223448128000 3580764312000 3758029872000 3795610170720 3819481932800 3868137753600 3913000176000 3953760594500 4048650848768 4744512713400 4774352416000 4835172192000 5010706496000 5060813560960 5217333568000 5729222899200 5930640891750 6012847795200 6072976273152 6260800281600 6326016951200 6446896256000 7161528624000 7516059744000 7591220341440 7826000352000 7907521189000 8097301697536 9489025426800 9548704832000 9670344384000 10021412992000 10121627121920 10434667136000 11458445798400 11861281783500 12145952546304 12652033902400 14323057248000 15032119488000 15182440682880 15652000704000 15815042378000 18978050853600 19097409664000 19340688768000 20243254243840 23722563567000 24291905092608 25304067804800 28646114496000 30064238976000 30364881365760 31304001408000 31630084756000 37956101707200 40486508487680 47445127134000 50608135609600 57292228992000 60729762731520 63260169512000 75912203414400 94890254268000 101216271219200 121459525463040 126520339024000 151824406828800 189780508536000 202432542438400 253040678048000 303648813657600 379561017072000 506081356096000 607297627315200 759122034144000 1012162712192000 1518244068288000 3036488136576000
- Sum of all divisors σ(n): 10568100746646144
- Sum of proper divisors (its aliquot sum) s(n): 7531612610070144
- 3036488136576000 is an abundant number, because the sum of its proper divisors (7531612610070144) is greater than itself. Its abundance is 4495124473494144
Bases of 3036488136576000
- Binary: 10101100100110101011011111001011111011001100000000002
- Hexadecimal: 0xAC9AB7CBECC00
- Base-36: TWCFE4PT6O
Squares and roots of 3036488136576000
- 3036488136576000 squared (30364881365760002) is 9220260203566788829003776000000
- 3036488136576000 cubed (30364881365760003) is 27997210724274369040141768888707710976000000000
-
The
square root of 3036488136576000 is 55104338.6365901319 -
The
cube root of 3036488136576000 is 144807.3245320685
Scales and comparisons
How big is 3036488136576000?- 3,036,488,136,576,000 seconds is equal to 96,550,930 years, 13 weeks, 6 days, 18 hours, 40 minutes.
-
To count from 1 to 3,036,488,136,576,000 would take you about two hundred eighty-nine million, six hundred fifty-two thousand, seven hundred ninety 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 3036488136576000 cubic inches would be around 12067.3 feet tall.
Recreational maths with 3036488136576000
- 3036488136576000 backwards is 0006756318846303
- 3036488136576000 is a
Harshad number . - The number of decimal digits it has is: 16
- The sum of 3036488136576000's digits is 60
- 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 3036488136576000 - Facts about the integer". Numbermatics.com. 2024. Web. 26 May 2024.
APA style:
Numbermatics. (2024). Number 3036488136576000 - Facts about the integer. Retrieved 26 May 2024, from https://numbermatics.com/n/3036488136576000/
Chicago style:
Numbermatics. 2024. "Number 3036488136576000 - Facts about the integer". https://numbermatics.com/n/3036488136576000/
The information we have on file for 3036488136576000 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 3036488136576000, math, Factors of 3036488136576000, curriculum, school, college, exams, university, Prime factorization of 3036488136576000, STEM, science, technology, engineering, physics, economics, calculator, three quadrillion, thirty-six trillion, four hundred eighty-eight billion, one hundred thirty-six million, five hundred seventy-six thousand.