634409523516 has 12 divisors (see below), whose sum is σ = 1480288888232. Its totient is φ = 211469841168.

The previous prime is 634409523493. The next prime is 634409523541. The reversal of 634409523516 is 615325904436.

It is a tau number, because it is divible by the number of its divisors (12).

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 in 3 ways as a sum of consecutive naturals, for example, 26433730135 + ... + 26433730158.

Almost surely, 2^634409523516 is an apocalyptic number.

It is an amenable number.

634409523516 is an abundant number, since it is smaller than the sum of its proper divisors (845879364716).

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

634409523516 is a wasteful number, since it uses less digits than its factorization.

634409523516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52867460300 (or 52867460298 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 634409523516 in words is "six hundred thirty-four billion, four hundred nine million, five hundred twenty-three thousand, five hundred sixteen".