So if you win the $640 million jackpoint, how much does Uncle Sam get?

So if a person happens to win the $640 million Mega Millions jackpot and is the only winner, how much will that person have to pay in taxes? 

It depends on where you live and whether you take the lump sum payment option but if you live in NYC, and opt for the lump sum payment of $462 million you could end up paying as much as $199.5 million in fed/state/local taxes.