256523731681230 has 96 divisors (see below), whose sum is σ = 718321208439744. Its totient is φ = 63139489141248.

The previous prime is 256523731681223. The next prime is 256523731681241. The reversal of 256523731681230 is 32186137325652.

256523731681230 is a `hidden beast` number, since 2 + 5 + 6 + 523 + 7 + 3 + 1 + 6 + 81 + 2 + 30 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7007442 + ... + 23709738.

It is an arithmetic number, because the mean of its divisors is an integer number (7482512587914).

Almost surely, 2^{256523731681230} is an apocalyptic number.

256523731681230 is an abundant number, since it is smaller than the sum of its proper divisors (461797476758514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256523731681230 is a wasteful number, since it uses less digits than its factorization.

256523731681230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16715450 (or 16715447 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 256523731681230 in words is "two hundred fifty-six trillion, five hundred twenty-three billion, seven hundred thirty-one million, six hundred eighty-one thousand, two hundred thirty".