642336875 has 10 divisors (see below), whose sum is σ = 802664940. Its totient is φ = 513869000.

The previous prime is 642336859. The next prime is 642336883. The reversal of 642336875 is 578633246.

It is not a de Polignac number, because 642336875 - 2⁴ = 642336859 is a prime.

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 9 ways as a sum of consecutive naturals, for example, 513245 + ... + 514494.

It is an arithmetic number, because the mean of its divisors is an integer number (80266494).

Almost surely, 2^642336875 is an apocalyptic number.

642336875 is a deficient number, since it is larger than the sum of its proper divisors (160328065).

642336875 is an equidigital number, since it uses as much as digits as its factorization.

642336875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027759 (or 1027744 counting only the distinct ones).

The product of its digits is 725760, while the sum is 44.

The square root of 642336875 is about 25344.3657446778. The cubic root of 642336875 is about 862.8214862602.

The spelling of 642336875 in words is "six hundred forty-two million, three hundred thirty-six thousand, eight hundred seventy-five".