90724365808 has 20 divisors (see below), whose sum is σ = 175783158880. Its totient is φ = 45360969984.

The previous prime is 90724365773. The next prime is 90724365859. The reversal of 90724365808 is 80856342709.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030633 + ... + 1115191.

It is an arithmetic number, because the mean of its divisors is an integer number (8789157944).

Almost surely, 2^90724365808 is an apocalyptic number.

It is an amenable number.

90724365808 is a deficient number, since it is larger than the sum of its proper divisors (85058793072).

90724365808 is a wasteful number, since it uses less digits than its factorization.

90724365808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151624 (or 151618 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 90724365808 in words is "ninety billion, seven hundred twenty-four million, three hundred sixty-five thousand, eight hundred eight".