256523018942030 has 256 divisors, whose sum is σ = 496738551988224. Its totient is φ = 95170660992000.

The previous prime is 256523018942023. The next prime is 256523018942033. The reversal of 256523018942030 is 30249810325652.

It is a self number, because there is not a number n which added to its sum of digits gives 256523018942030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256523018942033) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 166249525439 + ... + 166249526981.

It is an arithmetic number, because the mean of its divisors is an integer number (1940384968704).

Almost surely, 2^{256523018942030} is an apocalyptic number.

256523018942030 is a deficient number, since it is larger than the sum of its proper divisors (240215533046194).

256523018942030 is a wasteful number, since it uses less digits than its factorization.

256523018942030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 256523018942030 in words is "two hundred fifty-six trillion, five hundred twenty-three billion, eighteen million, nine hundred forty-two thousand, thirty".