642615532 has 48 divisors (see below), whose sum is σ = 1227907072. Its totient is φ = 292507200.

The previous prime is 642615529. The next prime is 642615581. The reversal of 642615532 is 235516246.

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, 1750813 + ... + 1751179.

Almost surely, 2^642615532 is an apocalyptic number.

It is an amenable number.

642615532 is a deficient number, since it is larger than the sum of its proper divisors (585291540).

642615532 is a wasteful number, since it uses less digits than its factorization.

642615532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 756 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 642615532 is about 25349.8625637300. The cubic root of 642615532 is about 862.9462372525.

The spelling of 642615532 in words is "six hundred forty-two million, six hundred fifteen thousand, five hundred thirty-two".