630776864 has 24 divisors (see below), whose sum is σ = 1243505340. Its totient is φ = 314966016.

The previous prime is 630776849. The next prime is 630776929. The reversal of 630776864 is 468677036.

It can be written as a sum of positive squares in 2 ways, for example, as 620408464 + 10368400 = 24908^2 + 3220^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11792 + ... + 37424.

Almost surely, 2^630776864 is an apocalyptic number.

It is an amenable number.

630776864 is a deficient number, since it is larger than the sum of its proper divisors (612728476).

630776864 is a wasteful number, since it uses less digits than its factorization.

630776864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26412 (or 26404 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The square root of 630776864 is about 25115.2715294898. The cubic root of 630776864 is about 857.6141116942.

The spelling of 630776864 in words is "six hundred thirty million, seven hundred seventy-six thousand, eight hundred sixty-four".