634987616 has 24 divisors (see below), whose sum is σ = 1258420464. Its totient is φ = 315388800.

The previous prime is 634987589. The next prime is 634987627. The reversal of 634987616 is 616789436.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60875 + ... + 70538.

It is an arithmetic number, because the mean of its divisors is an integer number (52434186).

Almost surely, 2^634987616 is an apocalyptic number.

It is an amenable number.

634987616 is a deficient number, since it is larger than the sum of its proper divisors (623432848).

634987616 is a wasteful number, since it uses less digits than its factorization.

634987616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131574 (or 131566 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 634987616 is about 25198.9606134856. The cubic root of 634987616 is about 859.5182158160.

The spelling of 634987616 in words is "six hundred thirty-four million, nine hundred eighty-seven thousand, six hundred sixteen".