This isn't much of a coincidence. We have days, hours, and minutes that are designed to be divided into 3's, 4's and 5's, and then there are lots of factors of

This isn't much of a coincidence. We have days, hours, and minutes that are designed to be divided into 3's, 4's and 5's, and then there are lots of factors of 10's in the fifth hyperfactorial, getting us down to milliseconds. It's fun that it happens to work out to the hyperfactorial, but if it didn't, it was always going to be just a couple of additional or fewer 2s, 3s, and 5s away.