642896912 has 40 divisors (see below), whose sum is σ = 1426075392. Its totient is φ = 275040000.

The previous prime is 642896909. The next prime is 642896921. The reversal of 642896912 is 219698246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62537 + ... + 72087.

Almost surely, 2^642896912 is an apocalyptic number.

It is an amenable number.

642896912 is an abundant number, since it is smaller than the sum of its proper divisors (783178480).

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

642896912 is a wasteful number, since it uses less digits than its factorization.

642896912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10167 (or 10161 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 642896912 is about 25355.4118878002. The cubic root of 642896912 is about 863.0721707064.

The spelling of 642896912 in words is "six hundred forty-two million, eight hundred ninety-six thousand, nine hundred twelve".