With this information, you can calculate the quantity of days 15 seconds is equal to.

¿What is the inverse calculation between 1 day and 15 seconds?

Performing the inverse calculation of the relationship between units, we obtain that 1 day is 5760 times 15 seconds.

Which is the same to say that 15 seconds is 0.00017361111 days.

Fifteen seconds equals to zero days. *Approximation

A day is five thousand seven hundred sixty times fifteen seconds. *Approximation