Is 5.39 x 10^44 times 3.10 x 10^6 times 1.375 x 10^13 equal to 2.297 x 10^64?

If a moment is the shortest possible length of time, it would be approximately equal to 5.39×10^-44 seconds. A second would contain 5.39×10^44 moments. A year has about 31,557,600 seconds (on average) and the universe is believed to be about 13.75 billion years old. Therefore, 2.297×10^64 moments would have passed since the Big Bang begun. Is my arithmetic correct?