165525348170000
165,525,348,170,000 is an even composite number composed of six prime numbers multiplied together.
165525348170000 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two thousand, two hundred fifty divisors.
Prime factorization of 165525348170000:
24 × 54 × 74 × 132 × 192 × 113
(2 × 2 × 2 × 2 × 5 × 5 × 5 × 5 × 7 × 7 × 7 × 7 × 13 × 13 × 19 × 19 × 113)See below for interesting mathematical facts about the number 165525348170000 from the Numbermatics database.
Names of 165525348170000
- Cardinal: 165525348170000 can be written as One hundred sixty-five trillion, five hundred twenty-five billion, three hundred forty-eight million, one hundred seventy thousand.
Scientific notation
- Scientific notation: 1.6552534817 × 1014
Factors of 165525348170000
Divisors of 165525348170000
- Number of divisors d(n): 2250
-
Complete list of divisors:
1 2 4 5 7 8 10 13 14 16 19 20 25 26 28 35 38 40 49 50 52 56 65 70 76 80 91 95 98 100 104 112 113 125 130 133 140 152 169 175 182 190 196 200 208 226 245 247 250 260 266 280 304 325 338 343 350 361 364 380 392 400 452 455 475 490 494 500 520 532 560 565 625 637 650 665 676 686 700 722 728 760 784 791 845 875 904 910 931 950 980 988 1000 1040 1064 1130 1183 1225 1235 1250 1274 1300 1330 1352 1372 1400 1444 1456 1469 1520 1582 1625 1690 1715 1729 1750 1805 1808 1820 1862 1900 1960 1976 2000 2128 2147 2260 2275 2366 2375 2401 2450 2470 2500 2527 2548 2600 2660 2704 2744 2800 2825 2888 2938 3164 3185 3211 3250 3325 3380 3430 3458 3500 3610 3640 3724 3800 3920 3952 3955 4225 4294 4375 4459 4520 4550 4655 4693 4732 4750 4802 4900 4940 5000 5054 5096 5200 5320 5488 5537 5650 5776 5876 5915 6125 6175 6328 6370 6422 6500 6517 6650 6760 6860 6916 7000 7220 7280 7345 7448 7600 7910 8125 8281 8450 8575 8588 8645 8750 8918 9025 9040 9100 9310 9386 9464 9500 9604 9800 9880 10000 10108 10192 10283 10640 10735 11074 11300 11375 11752 11830 11875 12005 12103 12250 12350 12635 12656 12740 12844 13000 13034 13300 13520 13720 13832 14000 14125 14440 14690 14896 15029 15820 15925 16055 16250 16562 16625 16900 17150 17176 17290 17500 17689 17836 18050 18200 18620 18772 18928 19000 19097 19208 19600 19760 19775 20216 20566 21125 21470 22148 22295 22477 22600 22750 23275 23465 23504 23660 23750 24010 24206 24500 24700 25270 25480 25688 26000 26068 26600 27440 27664 27685 27911 28250 28880 29380 29575 30058 30625 30875 31213 31640 31850 32110 32500 32585 32851 33124 33250 33800 34300 34352 34580 35000 35378 35672 36100 36400 36725 37240 37544 38000 38194 38416 38759 39550 40432 40793 41132 41405 42250 42875 42940 43225 44296 44590 44954 45125 45200 45500 45619 46550 46930 47320 47500 48020 48412 49000 49400 50540 50960 51376 51415 52136 53200 53675 55370 55822 56500 56875 57967 58760 59150 60025 60116 60515 61009 61250 61750 62426 63175 63280 63700 64220 65000 65170 65702 66248 66500 67600 68600 69160 70000 70625 70756 71344 71981 72200 73450 74480 75088 75145 76388 77518 79100 79625 80275 81586 82264 82810 83125 84500 84721 85750 85880 86450 88445 88592 89180 89908 90250 91000 91238 93100 93860 94640 95000 95485 96040 96824 98000 98800 98875 101080 102830 104272 105203 105625 107350 110740 111475 111644 112385 113000 113750 115934 116375 117325 117520 118300 120050 120232 121030 122018 122500 123500 123823 124852 126350 127400 128440 130000 130340 131404 132496 133000 133679 137200 138320 138425 139555 141250 141512 143962 144400 146900 147875 150290 152776 154375 155036 156065 157339 158200 159250 160550 162925 163172 164255 164528 165620 166250 169000 169442 171500 171760 172900 176890 178360 179816 180500 182000 182476 183625 186200 187720 190000 190970 192080 193648 193795 195377 197750 202160 203965 205660 207025 210406 211250 214375 214700 216125 221480 222950 223288 224770 225625 226000 227500 228095 229957 231868 232750 234650 236600 240100 240464 242060 244036 245000 247000 247646 249704 252700 254800 256880 257075 260680 262808 266000 267358 268375 271313 276850 279110 282500 283024 285551 287924 289835 293800 295750 300125 300580 302575 305045 305552 308750 310072 312130 314678 315875 316400 318500 321100 325850 326344 328510 331240 332500 338000 338884 343000 345800 353780 356720 359632 359905 361000 362843 364952 367250 372400 375440 375725 381940 387590 390754 395500 398125 401375 405769 407930 411320 414050 420812 422500 423605 427063 428750 429400 432250 442225 442960 445900 446576 449540 451250 455000 456190 459914 463736 465500 469300 473200 477425 480200 484120 488072 490000 494000 494375 495292 499408 503867 505400 514150 521360 525616 526015 530309 534716 536750 542626 553700 557375 558220 561925 565000 571102 575848 579670 581875 586625 587600 591500 593047 600250 601160 605150 610090 617500 619115 620144 624260 629356 631750 637000 642200 651700 652688 657020 662480 665000 668395 677768 686000 691600 692125 697775 707560 719810 722000 725686 729904 734500 736421 739375 751450 763880 775180 780325 781508 786695 791000 796250 802750 811538 814625 815860 821275 822640 828100 841624 845000 847210 854126 857500 858800 864500 866761 884450 891800 899080 902500 910000 912380 918125 919828 927472 931000 935753 938600 954850 960400 968240 968975 976144 976885 988750 990584 1007734 1010800 1019825 1028300 1035125 1052030 1060618 1069432 1073500 1080625 1085252 1101373 1107400 1114750 1116440 1123850 1130000 1140475 1142204 1149785 1151696 1159340 1163750 1173250 1183000 1186094 1200500 1202320 1210300 1220180 1235000 1238230 1248520 1258712 1263500 1274000 1284400 1285375 1303400 1314040 1330000 1336790 1341875 1355536 1356565 1367639 1384250 1395550 1415120 1427755 1439620 1449175 1451372 1469000 1472842 1478750 1500625 1502900 1512875 1525225 1527760 1550360 1560650 1563016 1573390 1579375 1582000 1592500 1605500 1609699 1623076 1629250 1631720 1642550 1656200 1683248 1690000 1694420 1708252 1715000 1729000 1733522 1768900 1783600 1798160 1799525 1805000 1814215 1824760 1836250 1839656 1862000 1871506 1877200 1878625 1909700 1937950 1953770 1977500 1981168 1998857 2006875 2015468 2028845 2039650 2056600 2070250 2104060 2118025 2121236 2135315 2138864 2147000 2161250 2170504 2202746 2211125 2214800 2229500 2232880 2247700 2280950 2284408 2299570 2318680 2327500 2346500 2366000 2372188 2387125 2401000 2420600 2440360 2470000 2476460 2497040 2517424 2519335 2527000 2539901 2570750 2606800 2628080 2630075 2651545 2673580 2683750 2713130 2735278 2768500 2786875 2791100 2809625 2855510 2879240 2898350 2902744 2933125 2938000 2945684 2957500 2965235 2989441 3001250 3005800 3025750 3050450 3095575 3100720 3121300 3126032 3146780 3158750 3185000 3211000 3219398 3246152 3258500 3263440 3285100 3312400 3341975 3388840 3416504 3430000 3458000 3460625 3467044 3488875 3527069 3537800 3599050 3610000 3628430 3649520 3672500 3679312 3682105 3712163 3743012 3757250 3819400 3875900 3901625 3907540 3933475 3955000 3997714 4013750 4030936 4057690 4073125 4079300 4106375 4113200 4140500 4208120 4236050 4242472 4270630 4294000 4322500 4333805 4341008 4405492 4422250 4459000 4495400 4561900 4568816 4599140 4637360 4655000 4678765 4693000 4744376 4774250 4802000 4841200 4844875 4880720 4884425 4952920 5038670 5054000 5079802 5099125 5141500 5154947 5175625 5260150 5303090 5347160 5367500 5426260 5470556 5506865 5537000 5573750 5582200 5619250 5702375 5711020 5748925 5758480 5796700 5805488 5866250 5891368 5915000 5930470 5978882 6002500 6011600 6051500 6100900 6191150 6242600 6293560 6317500 6370000 6422000 6426875 6438796 6492304 6517000 6550271 6570200 6683950 6777680 6782825 6833008 6838195 6894017 6921250 6934088 6977750 7054138 7075600 7138775 7198100 7245875 7256860 7345000 7364210 7424326 7486024 7514500 7564375 7626125 7638800 7709611 7751800 7803250 7815080 7866950 7910000 7995428 8027500 8048495 8061872 8115380 8146250 8158600 8212750 8281000 8416240 8472100 8484944 8541260 8645000 8667610 8810984 8844500 8918000 8990800 8997625 9071075 9123800 9198280 9310000 9357530 9386000 9393125 9488752 9548500 9573473 9689750 9768850 9905840 9994285 10077340 10144225 10159604 10198250 10283000 10309894 10351250 10520300 10590125 10606180 10676575 10694320 10735000 10852520 10941112 11013730 11055625 11074000 11147500 11164400 11238500 11267893 11404750 11422040 11497850 11593400 11732500 11782736 11830000 11860940 11935625 11957764 12005000 12103000 12201800 12382300 12485200 12587120 12596675 12635000 12699505 12853750 12877592 13034000 13100542 13140400 13150375 13257725 13367900 13565650 13676390 13788034 13842500 13868176 13955500 13991999 14048125 14108276 14277550 14396200 14491750 14513720 14690000 14728420 14826175 14848652 14947205 14972048 15029000 15128750 15252250 15419222 15477875 15503600 15606500 15630160 15733900 15990856 16055000 16096990 16230760 16292500 16317200 16425500 16562000 16709875 16944200 17082520 17290000 17335220 17444375 17621968 17635345 17689000 17779307 17995250 18142150 18247600 18396560 18410525 18560815 18715060 18786250 19097000 19146946 19379500 19508125 19537700 19667375 19988570 20154680 20288450 20319208 20396500 20531875 20566000 20619788 20702500 20926087 21040600 21180250 21212360 21353150 21470000 21669025 21705040 21882224 22027460 22111250 22295000 22477000 22535786 22809500 22844080 22995700 23186800 23393825 23465000 23721880 23871250 23915528 24010000 24206000 24224375 24403600 24422125 24764600 25193350 25270000 25399010 25495625 25707500 25755184 25774735 25985141 26201084 26300750 26515450 26735800 27131300 27352780 27534325 27576068 27685000 27911000 27983998 28096250 28216552 28511875 28555100 28744625 28792400 28983500 29027440 29456840 29652350 29697304 29894410 30058000 30257500 30504500 30838444 30955750 31213000 31467800 31981712 32110000 32193980 32461520 32585000 32751355 32851000 33419750 33888400 33914125 34165040 34190975 34470085 34670440 34888750 35270690 35378000 35558614 35693875 35990500 36229375 36284300 36821050 37121630 37430120 37572500 38130625 38194000 38293892 38548055 38759000 39016250 39075400 39334750 39977140 40242475 40309360 40576900 40638416 40793000 41063750 41239576 41405000 41852174 42081200 42360500 42424720 42706300 43338050 44054920 44222500 44590000 44954000 44988125 45071572 45355375 45619000 45851897 45991400 46787650 46930000 47443760 47742500 47831056 47867365 48258119 48448750 48844250 49529200 49971425 50386700 50721125 50798020 50991250 51415000 51549470 51970282 52402168 52601500 52950625 53030900 53382875 53471600 54262600 54705560 55068650 55152136 55370000 55822000 55967996 56192500 56339465 56433104 57023750 57110200 57489250 57967000 58913680 59304700 59394608 59788820 60515000 61009000 61676888 61911500 62426000 62935600 62983375 63497525 64387960 65170000 65502710 65702000 65751875 66288625 66839500 67014311 67828250 68381950 68940170 69340880 69777500 69959995 70541380 71117228 71387750 71981000 72458750 72568600 73642100 74130875 74243260 74736025 74860240 75145000 76261250 76587784 77096110 77389375 77518000 78032500 78150800 78669500 79954280 80484950 81153800 81586000 82127500 82479152 82810000 83549375 83704348 84721000 85412600 86676100 88109840 88176725 88445000 88896535 89976250 90143144 90710750 91238000 91703794 91982800 92052625 92804075 93575300 95485000 95734730 96516238 96897500 97688500 97943993 98336875 99942850 100773400 101442250 101596040 101982500 102830000 103098940 103940564 104630435 104804336 105203000 105901250 106061800 106765750 108345125 108525200 109411120 110137300 110304272 111935992 112385000 112678930 114047500 114220400 114978500 115934000 116969125 118609400 119577640 121030000 122018000 122110625 123353776 123823000 124455149 125966750 126995050 128775920 128873675 129925705 131005420 131503750 132577250 133679000 134028622 135656500 136763900 137671625 137880340 139555000 139919990 141082760 142234456 142775500 143723125 143962000 144917500 145137200 146482609 147284200 148261750 148486520 149472050 150290000 152522500 153175568 154192220 154778750 156065000 157339000 159908560 160969900 162307600 163756775 164255000 167098750 167408696 169442000 169570625 170825200 170954875 172350425 173352200 176353450 176890000 177793070 178469375 179952500 180286288 181421500 181895987 183407588 184105250 185608150 187150600 190970000 191469460 192740275 193032476 193795000 195377000 195887986 196673750 199885700 201212375 201546800 202884500 203192080 203965000 206197880 207881128 209260870 210406000 211802500 212123600 213531500 216690250 220274600 223871984 224770000 225357860 226776875 228095000 229259485 229957000 233938250 237218800 239155280 239336825 241290595 244221250 247646000 248910298 249857125 251933500 253605625 253990100 257747350 259851410 262010840 263007500 265154500 266914375 267358000 268057244 271313000 273527800 275343250 275760680 279110000 279839980 281697325 282165520 284468912 285551000 287446250 289835000 292965218 294568400 296523500 296973040 298944100 305045000 308384440 309557500 312130000 314678000 314916875 317487625 321939800 327513550 328510000 331443125 334197500 334817392 335071555 337806833 339141250 341909750 344700850 346704400 349799975 352706900 355586140 356938750 359905000 362843000 363791974 366815176 368210500 370654375 371216300 373680125 374301200 382938920 385480550 386064952 387590000 390754000 391775972 393347500 399771400 402424750 405769000 407930000 412395760 415762256 418521740 423605000 427063000 433380500 440549200 440883625 444482675 450715720 453553750 456190000 458518970 459914000 460263125 464020375 467876500 478673650 482581190 488442500 489719965 497820596 499714250 503867000 507211250 507980200 515494700 519702820 523152175 524021680 526015000 530309000 533828750 536114488 541725625 542626000 547055600 550686500 551521360 559679960 563394650 571102000 574892500 579670000 584845625 585930436 593047000 597888200 610090000 616768880 619115000 622275745 629833750 634975250 643879600 644368375 649628525 655027100 662886250 668395000 670143110 675613666 678282500 683819500 688358125 689401700 699599950 705413800 711172280 713877500 719810000 725686000 727583948 732413045 733630352 736421000 741308750 742432600 747360250 765877840 770961100 772129904 783551944 786695000 799542800 804849500 811538000 818783875 837043480 847210000 854126000 854774375 861752125 866761000 871186043 881767250 888965350 901431440 907107500 909479935 917037940 920526250 928040750 935753000 957347300 963701375 965162380 976885000 979439930 995641192 999428500 1006061875 1007734000 1014422500 1015960400 1030989400 1039405640 1046304350 1052030000 1060618000 1067657500 1072228976 1083451250 1101373000 1119359920 1126789300 1146297425 1149785000 1169691250 1171860872 1186094000 1195776400 1196684125 1206452975 1238230000 1244551490 1249285625 1259667500 1269950500 1273271909 1288736750 1299257050 1310054200 1325772500 1336790000 1340286220 1351227332 1356565000 1367639000 1376716250 1378803400 1399199900 1408486625 1410827600 1422344560 1427755000 1455167896 1464826090 1472842000 1482617500 1484865200 1494720500 1541922200 1567103888 1573390000 1587438125 1609699000 1637567750 1674086960 1675357775 1689034165 1709548750 1723504250 1733522000 1742372086 1748999875 1763534500 1777930700 1814215000 1818959870 1834075880 1841052500 1856081500 1868400625 1871506000 1914694600 1927402750 1930324760 1953770000 1958879860 1991282384 1998857000 2012123750 2028845000 2061978800 2078811280 2092608700 2135315000 2166902500 2202746000 2204418125 2222413375 2253578600 2292594850 2299570000 2320101875 2339382500 2343721744 2364647831 2393368250 2412905950 2448599825 2489102980 2498571250 2519335000 2539901000 2546543818 2577473500 2598514100 2615760875 2620108400 2651545000 2680572440 2702454664 2713130000 2735278000 2753432500 2757606800 2798399800 2816973250 2855510000 2910335792 2929652180 2965235000 2989441000 3083844400 3111378725 3174876250 3219398000 3221841875 3248142625 3275135500 3350715550 3378068330 3419097500 3447008500 3484744172 3497999750 3527069000 3555861400 3628430000 3637919740 3662065225 3668151760 3682105000 3712163000 3736801250 3829389200 3854805500 3860649520 3917759720 3997714000 4024247500 4057690000 4093919375 4185217400 4270630000 4308760625 4333805000 4355930215 4408836250 4444826750 4507157200 4547399675 4585189700 4640203750 4678765000 4729295662 4786736500 4818506875 4825811900 4897199650 4978205960 4997142500 5038670000 5079802000 5093087636 5154947000 5197028200 5231521750 5303090000 5361144880 5404909328 5506865000 5596799600 5633946500 5731487125 5859304360 5930470000 5978882000 5983420625 6032264875 6222757450 6349752500 6366359545 6443683750 6496285250 6550271000 6701431100 6756136660 6838195000 6894017000 6969488344 6995999500 7042433125 7054138000 7111722800 7275839480 7324130450 7364210000 7424326000 7473602500 7709611000 7835519440 8048495000 8187838750 8370434800 8376788875 8445170825 8617521250 8667610000 8711860430 8744999375 8817672500 8889653500 9094799350 9170379400 9280407500 9357530000 9458591324 9573473000 9637013750 9651623800 9794399300 9956411920 9994285000 10186175272 10309894000 10394056400 10463043500 11013730000 11112066875 11267893000 11462974250 11718608720 11823239155 11966841250 12064529750 12242999125 12445514900 12699505000 12732719090 12887367500 12992570500 13078804375 13100542000 13402862200 13512273320 13676390000 13788034000 13938976688 13991999000 14084866250 14551678960 14648260900 14947205000 15419222000 15556893625 16096990000 16240713125 16375677500 16552534817 16753577750 16890341650 17235042500 17423720860 17489998750 17635345000 17779307000 18189598700 18310326125 18340758800 18560815000 18917182648 19146946000 19274027500 19303247600 19588798600 19988570000 20372350544 20926087000 21779651075 22224133750 22535786000 22736998375 22925948500 23646478310 23933682500 24129059500 24485998250 24891029800 25399010000 25465438180 25774735000 25985141000 26157608750 26805724400 27024546640 27983998000 28169732500 28657435625 29296521800 29894410000 30161324375 31113787250 31831797725 32481426250 32751355000 33105069634 33507155500 33780683300 34470085000 34847441720 34979997500 35270690000 35558614000 36379197400 36620652250 37121630000 37834365296 38548055000 39177597200 41852174000 41883944375 42225854125 43559302150 44448267500 45473996750 45851897000 47292956620 47867365000 48258119000 48971996500 49782059600 50930876360 51549470000 51970282000 52315217500 56339465000 57314871250 58593043600 59116195775 60322648750 61214995625 62227574500 63663595450 64962852500 65502710000 66210139268 67014311000 67561366600 68940170000 69694883440 69959995000 72758394800 73241304500 77096110000 77784468125 82762674085 83767888750 84451708250 87118604300 88896535000 90947993500 91551630625 91703794000 94585913240 95734730000 96516238000 97943993000 101861752720 104630435000 108898255375 112678930000 113684991875 114629742500 118232391550 120645297500 122429991250 124455149000 127327190900 129925705000 132420278536 134028622000 135122733200 139919990000 146482609000 155568936250 159158988625 165525348170 167535777500 168903416500 174237208600 177793070000 181895987000 183103261250 189171826480 195887986000 209260870000 211129270625 217796510750 227369983750 229259485000 236464783100 241290595000 244859982500 248910298000 254654381800 259851410000 264840557072 292965218000 295580978875 311137872500 318317977250 331050696340 335071555000 337806833000 348474417200 363791974000 366206522500 413813370425 422258541250 435593021500 454739967500 458518970000 472929566200 482581190000 489719965000 509308763600 544491276875 591161957750 622275745000 636635954500 662101392680 670143110000 675613666000 732413045000 795794943125 827626740850 844517082500 871186043000 909479935000 945859132400 979439930000 1088982553750 1182323915500 1244551490000 1273271909000 1324202785360 1464826090000 1477904894375 1591589886250 1655253481700 1689034165000 1742372086000 1818959870000 2069066852125 2177965107500 2364647831000 2546543818000 2955809788750 3183179772500 3310506963400 3378068330000 4138133704250 4355930215000 4729295662000 5911619577500 6366359545000 6621013926800 8276267408500 8711860430000 10345334260625 11823239155000 12732719090000 16552534817000 20690668521250 23646478310000 33105069634000 41381337042500 82762674085000 165525348170000
- Sum of all divisors σ(n): 539022325362642
- Sum of proper divisors (its aliquot sum) s(n): 373496977192642
- 165525348170000 is an abundant number, because the sum of its proper divisors (373496977192642) is greater than itself. Its abundance is 207971629022642
Bases of 165525348170000
- Binary: 1001011010001011010111111001010000111001000100002
- Hexadecimal: 0x968B5F943910
- Base-36: 1MO9AMK93K
Squares and roots of 165525348170000
- 165525348170000 squared (1655253481700002) is 27398640886799722348900000000
- 165525348170000 cubed (1655253481700003) is 4535169572172321598861002716513000000000000
-
The
square root of 165525348170000 is 12865665.4771527463 -
The
cube root of 165525348170000 is 54906.2146231313
Scales and comparisons
How big is 165525348170000?- 165,525,348,170,000 seconds is equal to 5,263,194 years, 3 weeks, 3 days, 20 hours, 33 minutes, 20 seconds.
-
To count from 1 to 165,525,348,170,000 would take you about thirteen million, one hundred fifty-seven thousand, nine hundred eighty-five years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 165525348170000 cubic inches would be around 4575.5 feet tall.
Recreational maths with 165525348170000
- 165525348170000 backwards is 000071843525561
- The number of decimal digits it has is: 15
- The sum of 165525348170000's digits is 47
- 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 165525348170000 - Facts about the integer". Numbermatics.com. 2024. Web. 28 May 2024.
APA style:
Numbermatics. (2024). Number 165525348170000 - Facts about the integer. Retrieved 28 May 2024, from https://numbermatics.com/n/165525348170000/
Chicago style:
Numbermatics. 2024. "Number 165525348170000 - Facts about the integer". https://numbermatics.com/n/165525348170000/
The information we have on file for 165525348170000 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 165525348170000, math, Factors of 165525348170000, curriculum, school, college, exams, university, Prime factorization of 165525348170000, STEM, science, technology, engineering, physics, economics, calculator, one hundred sixty-five trillion, five hundred twenty-five billion, three hundred forty-eight million, one hundred seventy thousand.