642610265 has 16 divisors (see below), whose sum is σ = 863974080. Its totient is φ = 454720320.

The previous prime is 642610231. The next prime is 642610277. The reversal of 642610265 is 562016246.

642610265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642610265 - 2⁸ = 642610009 is a prime.

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, 155855 + ... + 159924.

It is an arithmetic number, because the mean of its divisors is an integer number (53998380).

Almost surely, 2^642610265 is an apocalyptic number.

It is an amenable number.

642610265 is a deficient number, since it is larger than the sum of its proper divisors (221363815).

642610265 is a wasteful number, since it uses less digits than its factorization.

642610265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315832.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 642610265 is about 25349.7586773523. The cubic root of 642610265 is about 862.9438796218.

The spelling of 642610265 in words is "six hundred forty-two million, six hundred ten thousand, two hundred sixty-five".