642014636 has 48 divisors (see below), whose sum is σ = 1221225600. Its totient is φ = 294357888.

The previous prime is 642014621. The next prime is 642014641. The reversal of 642014636 is 636410246.

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, 299360 + ... + 301496.

It is an arithmetic number, because the mean of its divisors is an integer number (25442200).

Almost surely, 2^642014636 is an apocalyptic number.

It is an amenable number.

642014636 is a deficient number, since it is larger than the sum of its proper divisors (579210964).

642014636 is a wasteful number, since it uses less digits than its factorization.

642014636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286 (or 2284 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 642014636 is about 25338.0077354160. The cubic root of 642014636 is about 862.6771791994.

The spelling of 642014636 in words is "six hundred forty-two million, fourteen thousand, six hundred thirty-six".