634656464 has 20 divisors (see below), whose sum is σ = 1324235556. Its totient is φ = 292918272.

The previous prime is 634656443. The next prime is 634656467. The reversal of 634656464 is 464656436.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91393600 + 543262864 = 9560^2 + 23308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634656467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525409 + ... + 1525824.

Almost surely, 2^634656464 is an apocalyptic number.

It is an amenable number.

634656464 is an abundant number, since it is smaller than the sum of its proper divisors (689579092).

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

634656464 is a wasteful number, since it uses less digits than its factorization.

634656464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051254 (or 3051248 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 44.

The square root of 634656464 is about 25192.3890093814. The cubic root of 634656464 is about 859.3687742297.

The spelling of 634656464 in words is "six hundred thirty-four million, six hundred fifty-six thousand, four hundred sixty-four".