642431502260 has 24 divisors (see below), whose sum is σ = 1358040638976. Its totient is φ = 255270794400.

The previous prime is 642431502233. The next prime is 642431502263. The reversal of 642431502260 is 62205134246.

It is a self number, because there is not a number n which added to its sum of digits gives 642431502260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642431502263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106359812 + ... + 106365851.

It is an arithmetic number, because the mean of its divisors is an integer number (56585026624).

Almost surely, 2^642431502260 is an apocalyptic number.

It is an amenable number.

642431502260 is an abundant number, since it is smaller than the sum of its proper divisors (715609136716).

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

642431502260 is a wasteful number, since it uses less digits than its factorization.

642431502260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212725823 (or 212725821 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 642431502260 in words is "six hundred forty-two billion, four hundred thirty-one million, five hundred two thousand, two hundred sixty".