90931878984 has 16 divisors (see below), whose sum is σ = 227329697520. Its totient is φ = 30310626320.

The previous prime is 90931878971. The next prime is 90931879009. The reversal of 90931878984 is 48987813909.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894414122 + ... + 1894414169.

It is an arithmetic number, because the mean of its divisors is an integer number (14208106095).

Almost surely, 2^90931878984 is an apocalyptic number.

It is an amenable number.

90931878984 is an abundant number, since it is smaller than the sum of its proper divisors (136397818536).

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

90931878984 is a wasteful number, since it uses less digits than its factorization.

90931878984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788828300 (or 3788828296 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 66.

The spelling of 90931878984 in words is "ninety billion, nine hundred thirty-one million, eight hundred seventy-eight thousand, nine hundred eighty-four".