90931439490 has 32 divisors (see below), whose sum is σ = 218326824576. Its totient is φ = 24238231680.

The previous prime is 90931439483. The next prime is 90931439507. The reversal of 90931439490 is 9493413909.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561526 + ... + 705105.

It is an arithmetic number, because the mean of its divisors is an integer number (6822713268).

Almost surely, 2^90931439490 is an apocalyptic number.

90931439490 is an abundant number, since it is smaller than the sum of its proper divisors (127395385086).

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

90931439490 is a wasteful number, since it uses less digits than its factorization.

90931439490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269034.

The product of its (nonzero) digits is 944784, while the sum is 51.

The spelling of 90931439490 in words is "ninety billion, nine hundred thirty-one million, four hundred thirty-nine thousand, four hundred ninety".