642952016 has 20 divisors (see below), whose sum is σ = 1423679712. Its totient is φ = 275550816.

The previous prime is 642951989. The next prime is 642952027. The reversal of 642952016 is 610259246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2870210 + ... + 2870433.

Almost surely, 2^642952016 is an apocalyptic number.

It is an amenable number.

642952016 is an abundant number, since it is smaller than the sum of its proper divisors (780727696).

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

642952016 is a wasteful number, since it uses less digits than its factorization.

642952016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740658 (or 5740652 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 642952016 is about 25356.4984964407. The cubic root of 642952016 is about 863.0968285581.

The spelling of 642952016 in words is "six hundred forty-two million, nine hundred fifty-two thousand, sixteen".