630711656 has 8 divisors (see below), whose sum is σ = 1182584370. Its totient is φ = 315355824.

The previous prime is 630711649. The next prime is 630711671. The reversal of 630711656 is 656117036.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 616528900 + 14182756 = 24830^2 + 3766^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39419471 + ... + 39419486.

Almost surely, 2^630711656 is an apocalyptic number.

It is an amenable number.

630711656 is a deficient number, since it is larger than the sum of its proper divisors (551872714).

630711656 is a wasteful number, since it uses less digits than its factorization.

630711656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78838963 (or 78838959 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 630711656 is about 25113.9733216391. The cubic root of 630711656 is about 857.5845580694.

The spelling of 630711656 in words is "six hundred thirty million, seven hundred eleven thousand, six hundred fifty-six".