634682555904 has 640 divisors, whose sum is σ = 1874162188800. Its totient is φ = 190377492480.

The previous prime is 634682555863. The next prime is 634682555921. The reversal of 634682555904 is 409555286436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5931612619 + ... + 5931612725.

It is an arithmetic number, because the mean of its divisors is an integer number (2928378420).

Almost surely, 2^634682555904 is an apocalyptic number.

634682555904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634682555904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937081094400).

634682555904 is an abundant number, since it is smaller than the sum of its proper divisors (1239479632896).

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

634682555904 is a wasteful number, since it uses less digits than its factorization.

634682555904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 57.

The spelling of 634682555904 in words is "six hundred thirty-four billion, six hundred eighty-two million, five hundred fifty-five thousand, nine hundred four".