634518964 has 12 divisors (see below), whose sum is σ = 1114833888. Its totient is φ = 315995000.

The previous prime is 634518953. The next prime is 634518967. The reversal of 634518964 is 469815436.

It is a super-2 number, since 2×634518964² = 805228631351266592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634518967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314992 + ... + 316999.

It is an arithmetic number, because the mean of its divisors is an integer number (92902824).

Almost surely, 2^634518964 is an apocalyptic number.

It is an amenable number.

634518964 is a deficient number, since it is larger than the sum of its proper divisors (480314924).

634518964 is a wasteful number, since it uses less digits than its factorization.

634518964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632246 (or 632244 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The square root of 634518964 is about 25189.6598627294. The cubic root of 634518964 is about 859.3067082420.

The spelling of 634518964 in words is "six hundred thirty-four million, five hundred eighteen thousand, nine hundred sixty-four".