634072678838 has 4 divisors (see below), whose sum is σ = 951109018260. Its totient is φ = 317036339418.

The previous prime is 634072678823. The next prime is 634072678847. The reversal of 634072678838 is 838876270436.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 158518169708 + ... + 158518169711.

It is an arithmetic number, because the mean of its divisors is an integer number (237777254565).

Almost surely, 2^634072678838 is an apocalyptic number.

634072678838 is a deficient number, since it is larger than the sum of its proper divisors (317036339422).

634072678838 is a wasteful number, since it uses less digits than its factorization.

634072678838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317036339421.

The product of its (nonzero) digits is 65028096, while the sum is 62.

The spelling of 634072678838 in words is "six hundred thirty-four billion, seventy-two million, six hundred seventy-eight thousand, eight hundred thirty-eight".