634991144 has 16 divisors (see below), whose sum is σ = 1191642720. Its totient is φ = 317219760.

The previous prime is 634991143. The next prime is 634991167. The reversal of 634991144 is 441199436.

It is not an unprimeable number, because it can be changed into a prime (634991143) 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, 24524 + ... + 43259.

It is an arithmetic number, because the mean of its divisors is an integer number (74477670).

Almost surely, 2^634991144 is an apocalyptic number.

It is an amenable number.

634991144 is a deficient number, since it is larger than the sum of its proper divisors (556651576).

634991144 is a wasteful number, since it uses less digits than its factorization.

634991144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68960 (or 68956 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 634991144 is about 25199.0306162757. The cubic root of 634991144 is about 859.5198076448.

The spelling of 634991144 in words is "six hundred thirty-four million, nine hundred ninety-one thousand, one hundred forty-four".