90161972404 has 12 divisors (see below), whose sum is σ = 180323944864. Its totient is φ = 38640845304.

The previous prime is 90161972363. The next prime is 90161972437. The reversal of 90161972404 is 40427916109.

90161972404 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610035194 + ... + 1610035249.

Almost surely, 2^90161972404 is an apocalyptic number.

It is an amenable number.

90161972404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90161972404 is a wasteful number, since it uses less digits than its factorization.

90161972404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220070454 (or 3220070452 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 90161972404 in words is "ninety billion, one hundred sixty-one million, nine hundred seventy-two thousand, four hundred four".