634975616 has 128 divisors (see below), whose sum is σ = 1438248960. Its totient is φ = 276756480.

The previous prime is 634975591. The next prime is 634975637. The reversal of 634975616 is 616579436.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4999745 + ... + 4999871.

It is an arithmetic number, because the mean of its divisors is an integer number (11236320).

Almost surely, 2^634975616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634975616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719124480).

634975616 is an abundant number, since it is smaller than the sum of its proper divisors (803273344).

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

634975616 is a wasteful number, since it uses less digits than its factorization.

634975616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 260 counting only the distinct ones).

The product of its digits is 816480, while the sum is 47.

The square root of 634975616 is about 25198.7225073018. The cubic root of 634975616 is about 859.5128013883.

The spelling of 634975616 in words is "six hundred thirty-four million, nine hundred seventy-five thousand, six hundred sixteen".