72615963 has 16 divisors (see below), whose sum is σ = 111453440. Its totient is φ = 41194656.

The previous prime is 72615911. The next prime is 72615979. The reversal of 72615963 is 36951627.

It is not a de Polignac number, because 72615963 - 2⁹ = 72615451 is a prime.

It is the 8522-nd Hogben number.

It is not an unprimeable number, because it can be changed into a prime (72615563) by changing a digit.

It is a nontrivial repunit in base 8521.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9520 + ... + 15357.

It is an arithmetic number, because the mean of its divisors is an integer number (6965840).

Almost surely, 2^72615963 is an apocalyptic number.

72615963 is a deficient number, since it is larger than the sum of its proper divisors (38837477).

72615963 is a wasteful number, since it uses less digits than its factorization.

72615963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25026.

The product of its digits is 68040, while the sum is 39.

The square root of 72615963 is about 8521.5000440063. The cubic root of 72615963 is about 417.1997444343.

The spelling of 72615963 in words is "seventy-two million, six hundred fifteen thousand, nine hundred sixty-three".