90844661920 has 24 divisors (see below), whose sum is σ = 214620514164. Its totient is φ = 36337864704.

The previous prime is 90844661911. The next prime is 90844661987. The reversal of 90844661920 is 2916644809.

It can be written as a sum of positive squares in 2 ways, for example, as 90555253776 + 289408144 = 300924^2 + 17012^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283889409 + ... + 283889728.

Almost surely, 2^90844661920 is an apocalyptic number.

It is an amenable number.

90844661920 is an abundant number, since it is smaller than the sum of its proper divisors (123775852244).

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

90844661920 is a wasteful number, since it uses less digits than its factorization.

90844661920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567779152 (or 567779144 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 90844661920 in words is "ninety billion, eight hundred forty-four million, six hundred sixty-one thousand, nine hundred twenty".