2528500658770944
2,528,500,658,770,944 is an even composite number composed of five prime numbers multiplied together.
2528500658770944 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two thousand, one hundred twelve divisors.
Prime factorization of 2528500658770944:
210 × 33 × 117 × 13 × 192
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 11 × 11 × 11 × 11 × 11 × 11 × 11 × 13 × 19 × 19)See below for interesting mathematical facts about the number 2528500658770944 from the Numbermatics database.
Names of 2528500658770944
- Cardinal: 2528500658770944 can be written as Two quadrillion, five hundred twenty-eight trillion, five hundred billion, six hundred fifty-eight million, seven hundred seventy thousand, nine hundred forty-four.
Scientific notation
- Scientific notation: 2.528500658770944 × 1015
Factors of 2528500658770944
Divisors of 2528500658770944
- Number of divisors d(n): 2112
-
Complete list of divisors:
1 2 3 4 6 8 9 11 12 13 16 18 19 22 24 26 27 32 33 36 38 39 44 48 52 54 57 64 66 72 76 78 88 96 99 104 108 114 117 121 128 132 143 144 152 156 171 176 192 198 208 209 216 228 234 242 247 256 264 286 288 297 304 312 342 351 352 361 363 384 396 416 418 429 432 456 468 484 494 512 513 528 572 576 594 608 624 627 684 702 704 722 726 741 768 792 832 836 858 864 912 936 968 988 1024 1026 1056 1083 1089 1144 1152 1188 1216 1248 1254 1287 1331 1368 1404 1408 1444 1452 1482 1536 1573 1584 1664 1672 1716 1728 1824 1872 1881 1936 1976 2052 2112 2166 2178 2223 2288 2299 2304 2376 2432 2496 2508 2574 2662 2717 2736 2808 2816 2888 2904 2964 3072 3146 3168 3249 3267 3328 3344 3432 3456 3648 3744 3762 3861 3872 3952 3971 3993 4104 4224 4332 4356 4446 4576 4598 4608 4693 4719 4752 4864 4992 5016 5148 5324 5434 5472 5616 5632 5643 5776 5808 5928 6292 6336 6498 6534 6656 6669 6688 6864 6897 6912 7296 7488 7524 7722 7744 7904 7942 7986 8151 8208 8448 8664 8712 8892 9152 9196 9216 9386 9438 9504 9728 9747 9984 10032 10296 10648 10868 10944 11232 11264 11286 11552 11616 11856 11913 11979 12584 12672 12996 13068 13312 13338 13376 13728 13794 13824 14079 14157 14592 14641 14976 15048 15444 15488 15808 15884 15972 16302 16416 16896 17303 17328 17424 17784 18304 18392 18772 18876 19008 19456 19494 19968 20064 20592 20691 21296 21736 21888 22464 22572 23104 23232 23712 23826 23958 24453 25168 25289 25344 25992 26136 26676 26752 27456 27588 27648 28158 28314 29184 29282 29887 29952 30096 30888 30976 31616 31768 31944 32604 32832 33792 34606 34656 34848 35568 35739 35937 36608 36784 37544 37752 38016 38988 39936 40128 41184 41382 42237 42471 42592 43472 43681 43776 43923 44928 45144 46208 46464 47424 47652 47916 48906 50336 50578 50688 51623 51909 51984 52272 53352 53504 54912 55176 56316 56628 58368 58564 59774 59904 60192 61776 61952 62073 63232 63536 63888 65208 65664 69212 69312 69696 71136 71478 71874 73216 73359 73568 75088 75504 75867 76032 77976 80256 82368 82764 84474 84942 85184 86944 87362 87552 87846 89661 89856 90288 92416 92928 94848 95304 95832 97812 100672 101156 101376 103246 103818 103968 104544 106704 107008 107217 109824 110352 112632 113256 117128 119548 119808 120384 123552 123904 124146 126464 126711 127072 127776 130416 131043 131328 131769 138424 138624 139392 142272 142956 143748 146432 146718 147136 150176 151008 151734 152064 154869 155727 155952 160512 161051 164736 165528 168948 169884 170368 173888 174724 175104 175692 179322 179712 180576 184832 185856 189696 190333 190608 191664 195624 201344 202312 206492 207636 207936 209088 213408 214016 214434 219648 220704 225264 226512 227601 234256 239096 240768 247104 248292 252928 253422 254144 255552 260832 262086 262656 263538 268983 276848 277248 278179 278784 284544 285912 287496 293436 294272 300352 302016 303468 304128 309738 311454 311904 321024 322102 328757 329472 331056 337896 339768 340736 347776 349448 351384 358644 359424 361152 369664 371712 379392 380666 381216 383328 391248 393129 395307 402688 404624 412984 415272 415872 418176 426816 428868 439296 441408 450528 453024 455202 464607 467181 468512 478192 480491 481536 483153 494208 496584 506844 508288 511104 521664 524172 525312 527076 537966 553696 554496 556358 557568 567853 569088 570999 571824 574992 586872 588544 600704 604032 606936 619476 622908 623808 642048 644204 657514 658944 662112 675792 679536 681472 682803 695552 698896 702768 717288 722304 758784 761332 762432 766656 782496 786258 790614 805376 806949 809248 825968 830544 831744 834537 836352 853632 857736 882816 901056 906048 910404 929214 934362 937024 956384 960982 963072 966306 986271 988416 993168 1013688 1016576 1022208 1043328 1048344 1054152 1075932 1107392 1108992 1112716 1115136 1135706 1138176 1141998 1143648 1149984 1173744 1177088 1179387 1201408 1208064 1213872 1238952 1245816 1247616 1288408 1315028 1317888 1324224 1351584 1359072 1362944 1365606 1391104 1393821 1397792 1405536 1434576 1441473 1444608 1449459 1522664 1524864 1533312 1564992 1572516 1581228 1610752 1613898 1618496 1651936 1661088 1663488 1669074 1672704 1703559 1707264 1712997 1715472 1765632 1771561 1802112 1812096 1820808 1858428 1868724 1874048 1912768 1921964 1926144 1932612 1972542 1976832 1986336 2027376 2033152 2044416 2086656 2093663 2096688 2108304 2151864 2214784 2225432 2271412 2276352 2283996 2287296 2299968 2347488 2354176 2358774 2402816 2416128 2427744 2477904 2491632 2495232 2503611 2576816 2630056 2648448 2703168 2718144 2731212 2782208 2787642 2795584 2811072 2869152 2882946 2889216 2898918 2958813 3045328 3049728 3059969 3066624 3129984 3145032 3162456 3227796 3236992 3303872 3322176 3326976 3338148 3345408 3407118 3414528 3425994 3430944 3531264 3543122 3604224 3616327 3624192 3641616 3716856 3737448 3748096 3825536 3843928 3865224 3945084 3953664 3972672 4054752 4066304 4088832 4173312 4187326 4193376 4216608 4303728 4324419 4348377 4429568 4450864 4542824 4567992 4574592 4599936 4694976 4717548 4805632 4832256 4855488 4955808 4983264 4990464 5007222 5110677 5138991 5153632 5260112 5285401 5296896 5314683 5406336 5436288 5462424 5575284 5591168 5622144 5738304 5765892 5778432 5797836 5917626 6090656 6099456 6119938 6133248 6246383 6259968 6280989 6290064 6324912 6455592 6473984 6607744 6644352 6676296 6814236 6829056 6851988 6861888 7062528 7086244 7208448 7232654 7248384 7283232 7433712 7474896 7496192 7510833 7651072 7687856 7730448 7890168 7945344 8109504 8346624 8374652 8386752 8433216 8607456 8648838 8696754 8859136 8876439 8901728 9085648 9135984 9149184 9179907 9199872 9389952 9435096 9710976 9911616 9966528 9980928 10014444 10221354 10277982 10307264 10520224 10570802 10593792 10629366 10812672 10848981 10872576 10924848 11150568 11182336 11244288 11476608 11531784 11595672 11835252 12181312 12198912 12239876 12266496 12492766 12519936 12561978 12580128 12649824 12911184 12947968 12973257 13215488 13288704 13352592 13628472 13703976 13723776 14172488 14416896 14465308 14496768 14566464 14867424 14949792 14992384 15021666 15302144 15332031 15375712 15460896 15780336 15856203 15890688 15944049 16219008 16749304 16773504 16866432 17214912 17297676 17393508 17718272 17752878 17803456 18171296 18271968 18298368 18359814 18399744 18739149 18779904 18842967 18870192 19421952 19487171 19823232 19933056 20028888 20442708 20555964 20614528 21040448 21141604 21187584 21258732 21625344 21697962 21745152 21849696 22301136 22364672 22488576 22953216 23030293 23063568 23191344 23670504 24362624 24479752 24985532 25039872 25123956 25160256 25299648 25822368 25895936 25946514 26430976 26577408 26705184 27256944 27407952 27447552 27539721 28344976 28930616 29132928 29734848 29899584 30043332 30604288 30664062 30751424 30921792 31560672 31712406 31781376 31888098 32438016 32546943 33498608 33547008 33659659 33732864 34429824 34595352 34787016 35505756 35606912 36342592 36543936 36596736 36719628 36799488 37478298 37559808 37685934 37740384 38843904 38974342 39646464 39779597 39866112 40057776 40885416 41111928 41229056 42080896 42283208 42517464 43250688 43395924 43490304 43699392 44602272 44729344 44977152 45906432 46060586 46127136 46382688 47341008 47568609 47832147 48725248 48959504 49971064 50247912 50320512 50599296 51644736 51893028 52861952 53154816 53410368 54513888 54815904 54895104 55079442 56217447 56528901 56689952 57861232 58139411 58265856 58461513 59469696 59799168 60086664 61328124 61502848 61843584 63121344 63424812 63562752 63776196 64876032 65093886 66997216 67094016 67319318 67465728 68710213 68859648 69090879 69190704 69574032 71011512 71213824 72685184 73087872 73439256 74956596 75119616 75371868 75480768 77687808 77948684 79292928 79559194 79732224 80115552 81770832 82223856 82458112 82619163 84161792 84566416 85034928 86791848 87398784 89204544 91812864 92121172 92254272 92765376 94682016 95137218 95664294 97450496 97640829 97919008 99942128 100495824 100641024 100978977 101198592 103289472 103786056 106820736 109027776 109631808 109790208 110158884 112434894 113057802 113379904 115722464 116278822 116531712 116923026 118939392 119338791 119598336 120173328 122656248 123005696 123687168 126242688 126849624 127552392 129752064 130187772 133994432 134188032 134638636 134931456 137420426 137719296 138181758 138381408 139148064 142023024 142427648 142705827 145370368 146175744 146878512 149913192 150743736 150961536 155897368 158585856 159118388 159464448 160231104 163541664 164447712 164916224 165238326 168323584 168652341 169132832 170069856 173583696 174418233 174797568 175384539 178409088 184242344 184508544 185530752 189364032 190274436 191328588 194900992 195281658 195838016 199884256 200991648 201282048 201957954 202397184 206130639 206578944 207272637 207572112 213641472 218055552 219263616 220317768 224869788 226115604 226759808 231444928 232557644 233063424 233846052 237878784 238677582 239196672 240346656 245312496 246011392 247374336 252485376 253333223 253699248 255104784 260375544 267988864 269277272 274840852 275438592 276363516 276762816 278296128 284046048 284855296 285411654 290740736 292351488 293757024 299826384 301487472 301923072 302936931 311794736 318236776 320462208 327083328 328895424 330476652 336647168 337304682 338265664 340139712 347167392 348836466 349595136 350769078 356818176 358016373 368484688 369017088 370256249 371061504 378728064 380548872 382657176 390563316 391676032 399768512 401983296 402564096 403915908 404794368 412261278 413157888 414545274 415144224 427282944 436111104 437575567 438527232 440635536 449739576 452231208 453519616 462889856 465115288 467692104 475757568 477355164 478393344 480693312 490624992 492022784 494748672 504970752 506666446 507398496 510209568 520751088 523254699 526153617 535977728 538554544 549681704 552727032 553525632 556592256 568092096 570823308 581481472 584702976 587514048 599652768 602974944 603846144 605873862 618391917 621817911 623589472 636473552 639533521 640924416 654166656 657790848 660953304 674609364 676531328 680279424 694334784 697672932 699190272 701538156 713636352 716032746 736969376 738034176 740512498 742123008 755812343 757456128 759999669 761097744 765314352 781126632 783352064 799537024 803966592 807831816 824522556 826315776 829090548 830288448 854565888 872222208 875151134 877054464 881271072 899479152 904462416 907039232 908810793 925779712 930230576 935384208 954710328 961386624 981249984 1009941504 1013332892 1014796992 1020419136 1041502176 1046509398 1052307234 1071955456 1074049119 1077109088 1099363408 1105454064 1107051264 1110768747 1113184512 1136184192 1141646616 1175028096 1199305536 1205949888 1207692288 1211747724 1236783834 1243635822 1247178944 1272947104 1279067042 1281848832 1308333312 1312726701 1315581696 1321906608 1349218728 1353062656 1360558848 1388669568 1395345864 1403076312 1427272704 1432065492 1473938752 1476068352 1481024996 1484246016 1511624686 1514912256 1519999338 1522195488 1530628704 1562253264 1566704128 1569764097 1599074048 1607933184 1615663632 1649045112 1658181096 1660576896 1744444416 1750302268 1754108928 1762542144 1798958304 1808924832 1814078464 1817621586 1851559424 1855175751 1860461152 1870768416 1909420656 1918600563 1922773248 1962499968 2026665784 2029593984 2040838272 2083004352 2093018796 2104614468 2143910912 2148098238 2154218176 2198726816 2210908128 2214102528 2221537494 2226369024 2267437029 2272368384 2279999007 2283293232 2350056192 2398611072 2411899776 2423495448 2473567668 2487271644 2494357888 2545894208 2558134084 2563697664 2616666624 2625453402 2631163392 2643813216 2698437456 2706125312 2721117696 2777339136 2790691728 2806152624 2864130984 2947877504 2962049992 3023249372 3029824512 3039998676 3044390976 3061257408 3124506528 3133408256 3139528194 3198148096 3215866368 3231327264 3298090224 3316362192 3321153792 3332306241 3500604536 3525084288 3597916608 3617849664 3635243172 3703118848 3710351502 3720922304 3741536832 3818841312 3837201126 3845546496 3924999936 3938180103 4053331568 4059187968 4081676544 4166008704 4186037592 4209228936 4296196476 4308436352 4397453632 4421816256 4428205056 4443074988 4452738048 4534874058 4544736768 4559998014 4566586464 4700112384 4797222144 4813331237 4823799552 4846990896 4947135336 4974543288 4988715776 5091788416 5116268168 5233333248 5250906804 5262326784 5287626432 5396874912 5412250624 5442235392 5554678272 5581383456 5612305248 5728261968 5755801689 5895755008 5924099984 6046498744 6079997352 6088781952 6122514816 6249013056 6279056388 6396296192 6431732736 6462654528 6596180448 6632724384 6642307584 6664612482 6802311087 6839997021 7001209072 7034868731 7050168576 7195833216 7235699328 7270486344 7420703004 7441844608 7483073664 7637682624 7674402252 7691092992 7849999872 7876360206 8106663136 8118375936 8163353088 8313935773 8332017408 8372075184 8418457872 8592392952 8616872704 8794907264 8843632512 8886149976 9069748116 9089473536 9119996028 9133172928 9400224768 9594444288 9626662474 9647599104 9693981792 9894270672 9949086576 9977431552 9996918723 10183576832 10232536336 10501813608 10575252864 10793749824 11109356544 11162766912 11224610496 11456523936 11511603378 11791510016 11814540309 11848199968 12092997488 12159994704 12177563904 12245029632 12498026112 12558112776 12925309056 13192360896 13265448768 13284615168 13329224964 13604622174 13679994042 14002418144 14069737462 14100337152 14391666432 14439993711 14471398656 14540972688 14841406008 14883689216 14966147328 15275365248 15348804504 15699999744 15752720412 16213326272 16236751872 16326706176 16627871546 16664034816 16744150368 16836915744 17184785904 17233745408 17267405067 17589814528 17687265024 17772299952 18139496232 18239992056 18266345856 19188888576 19253324948 19295198208 19387963584 19788541344 19898173152 19954863104 19993837446 20367153664 20406933261 20465072672 21003627216 21104606193 21150505728 21587499648 22325533824 22449220992 22913047872 23023206756 23583020032 23629080618 23696399936 24185994976 24319989408 24355127808 24490059264 24941807319 24996052224 25116225552 25850618112 26384721792 26530897536 26658449928 27209244348 27359988084 28004836288 28139474924 28200674304 28783332864 28879987422 28942797312 29081945376 29682812016 29767378432 29932294656 30550730496 30697609008 31505440824 32426652544 33255743092 33328069632 33488300736 33673831488 34369571808 34467490816 34534810134 35179629056 35374530048 35544599904 36278992464 36479984112 36532691712 38506649896 38775927168 39577082688 39796346304 39987674892 40734307328 40813866522 40930145344 42007254432 42209212386 42301011456 43174999296 43319981133 44651067648 44898441984 45826095744 46046413512 47258161236 47392799872 48371989952 48639978816 48710255616 48980118528 49883614638 49992104448 50232451104 51701236224 52769443584 53061795072 53316899856 54418488696 54719976168 56009672576 56278949848 57566665728 57759974844 57885594624 58163890752 59365624032 59534756864 59864589312 61101460992 61395218016 63010881648 63313818579 64853305088 66511486184 66976601472 67347662976 68739143616 69069620268 70359258112 70749060096 71089199808 72557984928 72959968224 73065383424 74825421957 77013299792 77551854336 79154165376 79592692608 79975349784 81627733044 81860290688 84014508864 84418424772 84602022912 86349998592 86639962266 89302135296 89796883968 91453293503 91652191488 92092827024 94516322472 94785599744 96743979904 97279957632 99767229276 99984208896 100464902208 103402472448 105538887168 106123590144 106633799712 108836977392 109439952336 112019345152 112557899696 115519949688 116327781504 118731248064 122202921984 122790436032 126021763296 126627637158 129706610176 129959943399 133022972368 133953202944 134695325952 137478287232 138139240536 142178399616 145115969856 145919936448 146130766848 149650843914 154026599584 155103708672 158308330752 159185385216 159950699568 163255466088 163720581376 168029017728 168836849544 172699997184 173279924532 178604270592 179593767936 182906587006 183304382976 184185654048 189032644944 189571199488 189941455737 193487959808 194559915264 199534458552 200929804416 211077774336 212247180288 213267599424 217673954784 218879904672 224038690304 224476265871 225115799392 231039899376 232655563008 237462496128 245580872064 252043526592 253255274316 259413220352 259919886798 266045944736 267906405888 269390651904 274359880509 274956574464 276278481072 284356799232 290231939712 291839872896 299301687828 308053199168 310207417344 316616661504 318370770432 319901399136 326510932176 327441162752 336058035456 337673699088 346559849064 365813174012 366608765952 368371308096 378065289888 379142398976 379882911474 386975919616 389119830528 399068917104 401859608832 426535198848 435347909568 437759809344 448077380608 448952531742 450231598784 462079798752 465311126016 474924992256 491161744128 504087053184 506510548632 519839773596 532091889472 535812811776 538781303808 548719761018 549913148928 552556962144 568713598464 580463879424 583679745792 598603375656 616106398336 633233323008 636741540864 639802798272 653021864352 654882325504 672116070912 675347398176 693119698128 731626348024 736742616192 756130579776 759765822948 773951839232 778239661056 798137834208 803719217664 823079641527 853070397696 870695819136 875519618688 897905063484 900463197568 924159597504 930622252032 949849984512 982323488256 1008174106368 1013021097264 1039679547192 1064183778944 1097439522036 1099826297856 1105113924288 1137427196928 1160927758848 1167359491584 1197206751312 1232212796672 1279605596544 1306043728704 1344232141824 1350694796352 1386239396256 1463252696048 1473485232384 1512261159552 1519531645896 1596275668416 1607438435328 1646159283054 1706140795392 1741391638272 1751039237376 1795810126968 1800926395136 1848319195008 1899699969024 1964646976512 2016348212736 2026042194528 2079359094384 2128367557888 2194879044072 2210227848576 2321855517696 2334718983168 2394413502624 2464425593344 2469238924581 2559211193088 2612087457408 2701389592704 2772478792512 2926505392096 2946970464768 3024522319104 3039063291792 3192551336832 3292318566108 3412281590784 3482783276544 3502078474752 3591620253936 3601852790272 3696638390016 4032696425472 4052084389056 4158718188768 4256735115776 4389758088144 4420455697152 4788827005248 4928851186688 4938477849162 5118422386176 5224174914816 5402779185408 5544957585024 5853010784192 5893940929536 6049044638208 6078126583584 6385102673664 6584637132216 6965566553088 7004156949504 7183240507872 7203705580544 7393276780032 8104168778112 8317436377536 8513470231552 8779516176288 8840911394304 9577654010496 9876955698324 10236844772352 10448349829632 10805558370816 11089915170048 11706021568384 12098089276416 12156253167168 12770205347328 13169274264432 14366481015744 14786553560064 16208337556224 16634872755072 17559032352576 17681822788608 19155308020992 19753911396648 20896699659264 21611116741632 22179830340096 23412043136768 24312506334336 25540410694656 26338548528864 28732962031488 32416675112448 33269745510144 35118064705152 38310616041984 39507822793296 44359660680192 46824086273536 48625012668672 52677097057728 57465924062976 64833350224896 66539491020288 70236129410304 76621232083968 79015645586592 93648172547072 97250025337344 105354194115456 114931848125952 133078982040576 140472258820608 158031291173184 194500050674688 210708388230912 229863696251904 280944517641216 316062582346368 421416776461824 632125164692736 842833552923648 1264250329385472 2528500658770944
- Sum of all divisors σ(n): 9362079497352960
- Sum of proper divisors (its aliquot sum) s(n): 6833578838582016
- 2528500658770944 is an abundant number, because the sum of its proper divisors (6833578838582016) is greater than itself. Its abundance is 4305078179811072
Bases of 2528500658770944
- Binary: 10001111101110101000011011111001010010010100000000002
- Hexadecimal: 0x8FBA86F949400
- Base-36: OWA160A2O0
Squares and roots of 2528500658770944
- 2528500658770944 squared (25285006587709442) is 6393315581405097787156658651136
- 2528500658770944 cubed (25285006587709443) is 16165502659313330606970727056900471494629392384
-
The
square root of 2528500658770944 is 50284198.8975756081 -
The
cube root of 2528500658770944 is 136234.6845174019
Scales and comparisons
How big is 2528500658770944?- 2,528,500,658,770,944 seconds is equal to 80,398,499 years, 40 weeks, 4 days, 23 hours, 2 minutes, 24 seconds.
-
To count from 1 to 2,528,500,658,770,944 would take you about two hundred forty-one million, one hundred ninety-five thousand, four hundred ninety-nine years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 2528500658770944 cubic inches would be around 11352.9 feet tall.
Recreational maths with 2528500658770944
- 2528500658770944 backwards is 4490778560058252
- 2528500658770944 is a
Harshad number . - The number of decimal digits it has is: 16
- The sum of 2528500658770944's digits is 72
- 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 2528500658770944 - Facts about the integer". Numbermatics.com. 2024. Web. 4 June 2024.
APA style:
Numbermatics. (2024). Number 2528500658770944 - Facts about the integer. Retrieved 4 June 2024, from https://numbermatics.com/n/2528500658770944/
Chicago style:
Numbermatics. 2024. "Number 2528500658770944 - Facts about the integer". https://numbermatics.com/n/2528500658770944/
The information we have on file for 2528500658770944 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 2528500658770944, math, Factors of 2528500658770944, curriculum, school, college, exams, university, Prime factorization of 2528500658770944, STEM, science, technology, engineering, physics, economics, calculator, two quadrillion, five hundred twenty-eight trillion, five hundred billion, six hundred fifty-eight million, seven hundred seventy thousand, nine hundred forty-four.