256695130772 has 24 divisors (see below), whose sum is σ = 459958699200. Its totient is φ = 125282195136.

The previous prime is 256695130763. The next prime is 256695130801. The reversal of 256695130772 is 277031596652.

It is a happy number.

256695130772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210497 + ... + 746792.

It is an arithmetic number, because the mean of its divisors is an integer number (19164945800).

Almost surely, 2^256695130772 is an apocalyptic number.

It is an amenable number.

256695130772 is a deficient number, since it is larger than the sum of its proper divisors (203263568428).

256695130772 is a wasteful number, since it uses less digits than its factorization.

256695130772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958895 (or 958893 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 53.

The spelling of 256695130772 in words is "two hundred fifty-six billion, six hundred ninety-five million, one hundred thirty thousand, seven hundred seventy-two".