634961616 has 20 divisors (see below), whose sum is σ = 1640317632. Its totient is φ = 211653856.

The previous prime is 634961609. The next prime is 634961651. The reversal of 634961616 is 616169436.

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, 6614136 + ... + 6614231.

Almost surely, 2^634961616 is an apocalyptic number.

It is an amenable number.

634961616 is an abundant number, since it is smaller than the sum of its proper divisors (1005356016).

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

634961616 is a wasteful number, since it uses less digits than its factorization.

634961616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13228378 (or 13228372 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 634961616 is about 25198.4447139104. Note that the first 3 decimals coincide. The cubic root of 634961616 is about 859.5064844698.

The spelling of 634961616 in words is "six hundred thirty-four million, nine hundred sixty-one thousand, six hundred sixteen".