634641372838 has 32 divisors (see below), whose sum is σ = 1051235573760. Its totient is φ = 284943384000.

The previous prime is 634641372829. The next prime is 634641372941. The reversal of 634641372838 is 838273146436.

It is a happy number.

634641372838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 1776843 + ... + 2103913.

It is an arithmetic number, because the mean of its divisors is an integer number (32851111680).

Almost surely, 2^634641372838 is an apocalyptic number.

634641372838 is a deficient number, since it is larger than the sum of its proper divisors (416594200922).

634641372838 is a wasteful number, since it uses less digits than its factorization.

634641372838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328164.

The product of its digits is 13934592, while the sum is 55.

The spelling of 634641372838 in words is "six hundred thirty-four billion, six hundred forty-one million, three hundred seventy-two thousand, eight hundred thirty-eight".