90708899644 has 48 divisors (see below), whose sum is σ = 174425773536. Its totient is φ = 40933152000.

The previous prime is 90708899579. The next prime is 90708899657. The reversal of 90708899644 is 44699880709.

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 15 ways as a sum of consecutive naturals, for example, 8982262 + ... + 8992354.

It is an arithmetic number, because the mean of its divisors is an integer number (3633870282).

Almost surely, 2^90708899644 is an apocalyptic number.

It is an amenable number.

90708899644 is a deficient number, since it is larger than the sum of its proper divisors (83716873892).

90708899644 is a wasteful number, since it uses less digits than its factorization.

90708899644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11566 (or 11564 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 90708899644 in words is "ninety billion, seven hundred eight million, eight hundred ninety-nine thousand, six hundred forty-four".