634385409375 has 24 divisors (see below), whose sum is σ = 1057241363472. Its totient is φ = 338338880000.

The previous prime is 634385409319. The next prime is 634385409391. The reversal of 634385409375 is 573904583436.

634385409375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 634385409375 - 2⁷ = 634385409247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33824514 + ... + 33843263.

It is an arithmetic number, because the mean of its divisors is an integer number (44051723478).

Almost surely, 2^634385409375 is an apocalyptic number.

634385409375 is a deficient number, since it is larger than the sum of its proper divisors (422855954097).

634385409375 is an frugal number, since it uses more digits than its factorization.

634385409375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67667805 (or 67667785 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 57.

The spelling of 634385409375 in words is "six hundred thirty-four billion, three hundred eighty-five million, four hundred nine thousand, three hundred seventy-five".