90145198924 has 18 divisors (see below), whose sum is σ = 173399133572. Its totient is φ = 40975090200.

The previous prime is 90145198909. The next prime is 90145198963. The reversal of 90145198924 is 42989154109.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93124722 + ... + 93125689.

Almost surely, 2^90145198924 is an apocalyptic number.

It is an amenable number.

90145198924 is a deficient number, since it is larger than the sum of its proper divisors (83253934648).

90145198924 is a wasteful number, since it uses less digits than its factorization.

90145198924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186250437 (or 186250424 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 90145198924 in words is "ninety billion, one hundred forty-five million, one hundred ninety-eight thousand, nine hundred twenty-four".