90638702976 has 64 divisors (see below), whose sum is σ = 242597044800. Its totient is φ = 29982251520.

The previous prime is 90638702939. The next prime is 90638703011. The reversal of 90638702976 is 67920783609.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 850606 + ... + 951213.

It is an arithmetic number, because the mean of its divisors is an integer number (3790578825).

Almost surely, 2^90638702976 is an apocalyptic number.

90638702976 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

90638702976 is an abundant number, since it is smaller than the sum of its proper divisors (151958341824).

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

90638702976 is a wasteful number, since it uses less digits than its factorization.

90638702976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801967 (or 1801955 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 57.

The spelling of 90638702976 in words is "ninety billion, six hundred thirty-eight million, seven hundred two thousand, nine hundred seventy-six".