642717708634 has 32 divisors (see below), whose sum is σ = 1014540811200. Its totient is φ = 304969541760.

The previous prime is 642717708617. The next prime is 642717708727. The reversal of 642717708634 is 436807717246.

It is a happy number.

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, 12896937 + ... + 12946675.

It is an arithmetic number, because the mean of its divisors is an integer number (31704400350).

Almost surely, 2^642717708634 is an apocalyptic number.

642717708634 is a deficient number, since it is larger than the sum of its proper divisors (371823102566).

642717708634 is a wasteful number, since it uses less digits than its factorization.

642717708634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54078.

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 642717708634 in words is "six hundred forty-two billion, seven hundred seventeen million, seven hundred eight thousand, six hundred thirty-four".