256664000312 has 16 divisors (see below), whose sum is σ = 481621286400. Its totient is φ = 128231657280.

The previous prime is 256664000297. The next prime is 256664000317. The reversal of 256664000312 is 213000466652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256664000317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12531989 + ... + 12552452.

It is an arithmetic number, because the mean of its divisors is an integer number (30101330400).

Almost surely, 2^256664000312 is an apocalyptic number.

It is an amenable number.

256664000312 is a deficient number, since it is larger than the sum of its proper divisors (224957286088).

256664000312 is a wasteful number, since it uses less digits than its factorization.

256664000312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25085726 (or 25085722 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 256664000312 its reverse (213000466652), we get a palindrome (469664466964).

The spelling of 256664000312 in words is "two hundred fifty-six billion, six hundred sixty-four million, three hundred twelve", and thus it is an aban number.