255630664 has 8 divisors (see below), whose sum is σ = 479307510. Its totient is φ = 127815328.

The previous prime is 255630631. The next prime is 255630667. The reversal of 255630664 is 466036552.

It can be written as a sum of positive squares in only one way, i.e., 209960100 + 45670564 = 14490^2 + 6758^2 .

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (255630667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15976909 + ... + 15976924.

Almost surely, 2^255630664 is an apocalyptic number.

It is an amenable number.

255630664 is a deficient number, since it is larger than the sum of its proper divisors (223676846).

255630664 is a wasteful number, since it uses less digits than its factorization.

255630664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31953839 (or 31953835 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 255630664 is about 15988.4540841196. The cubic root of 255630664 is about 634.6549173868.

The spelling of 255630664 in words is "two hundred fifty-five million, six hundred thirty thousand, six hundred sixty-four".