Jen and Barry get sued by "Ben & Jerry's" for trademark infringement. Jen and Barry lose, and they need a LOT of money. They decide to play Tennetucky's "Mega-6" lottery. They'll win the jackpot if they correctly choose 6 non-repeating integer numbers between 1 and 39 (in any order) and those numbers are drawn. They buy one ticket (that's all the money they have left). What is the probability that it's the jackpot winner?