sep·ten·de·cil·lion | \ (ˌ)sep-ˌten-di-ˈsil-yən 
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\Definition of septendecillion
US : a number equal to 1 followed by 54 zeros — see Table of Numbers also, British : a number equal to 1 followed by 102 zeros — see Table of Numbers
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Time Traveler for septendecillion
The first known use of septendecillion was in 1848
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