642602584788 has 12 divisors (see below), whose sum is σ = 1499406031200. Its totient is φ = 214200861592.

The previous prime is 642602584781. The next prime is 642602584817. The reversal of 642602584788 is 887485206246.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642602584781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26775107688 + ... + 26775107711.

It is an arithmetic number, because the mean of its divisors is an integer number (124950502600).

Almost surely, 2^642602584788 is an apocalyptic number.

It is an amenable number.

642602584788 is an abundant number, since it is smaller than the sum of its proper divisors (856803446412).

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

642602584788 is a wasteful number, since it uses less digits than its factorization.

642602584788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53550215406 (or 53550215404 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 60.

The spelling of 642602584788 in words is "six hundred forty-two billion, six hundred two million, five hundred eighty-four thousand, seven hundred eighty-eight".