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You can't do that in Javascript: pow(2, 3200) is

19769064789825639936542264398379633403153906826257738289182657101583406010939511
26756295848974613063099294244703164628428967968057547050608904859234600159014229
32910219510157408105706166194810688480032112981869391460884528166146233381432654
43897411640093676025481038827241878315873949544631831377356573070196373591692908
34318700453890617892714561362370427388384101316010134426924662084888461376218489
65379424299905389115138246588848200330008567611017346799700349415983009427194750
60249742719534147060380682101703389616632028392036411208652632922487186929249151
89291455200665479606951612257868495299167071771306894428954788679149900427954823
30039364000764939774210663557382842575273030537523272133980387188929928113420821
11313410011356054468094774099792796272131886101128679295697894926404657366339250
65052540962862027736312499143902692033755536952046162410311395501619568814547777
27103125924797325086658311685361590835288130558729717818314538874578129700223818
1376
Maybe that part is a typo?
  • Like 1

You will need bcmath library to do it in php

$x = (37.739658 + 180) / 360;
$xtile = bcmul($x, bcpow(2,3200), 0);
echo $xtile;

giving

1195697057310125832371140711633564800180786038375872658403318152095581962252386539444192207669999
4207959832759648879404409081079451419565470276854106090269574245270335849760856131899854524127642
7324964717602398404052293164714217486036187584311373189602241206357140904647698252514706029297316
9903133287668377476541891044796672937490793296463688346149780776864963757079645918149252840838799
6339961375594565001261410980667493879041252370996632123897458999476098059823194577935019128254436
6030860257855571048100823754022659657970273909948380147791379123616894368709592470891060276597854
8271325003793426334823472642940015323876156075156400473671902771191374590935488622949583607624016
9866685125773087182548515916284210254502245372017267188638444500873324474387826190977942219959682
1489421060559178529999373973134461270691821511678419523717048252856218976237026885921242952914162
8090268067144283996195298887019205345498122356598595705782092401101204314360135493325755304
Edited by Barand
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