634386975042 has 16 divisors (see below), whose sum is σ = 1272308143680. Its totient is φ = 210873292752.

The previous prime is 634386975029. The next prime is 634386975071. The reversal of 634386975042 is 240579683436.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147255733 + ... + 147260040.

It is an arithmetic number, because the mean of its divisors is an integer number (79519258980).

Almost surely, 2^634386975042 is an apocalyptic number.

634386975042 is an abundant number, since it is smaller than the sum of its proper divisors (637921168638).

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

634386975042 is a wasteful number, since it uses less digits than its factorization.

634386975042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294516137.

The product of its (nonzero) digits is 26127360, while the sum is 57.

The spelling of 634386975042 in words is "six hundred thirty-four billion, three hundred eighty-six million, nine hundred seventy-five thousand, forty-two".