256525475131111 has 2 divisors, whose sum is σ = 256525475131112. Its totient is φ = 256525475131110.

The previous prime is 256525475131103. The next prime is 256525475131157. The reversal of 256525475131111 is 111131574525652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256525475131111 - 2³ = 256525475131103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256525475131181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128262737565555 + 128262737565556.

It is an arithmetic number, because the mean of its divisors is an integer number (128262737565556).

Almost surely, 2^{256525475131111} is an apocalyptic number.

256525475131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

256525475131111 is an equidigital number, since it uses as much as digits as its factorization.

256525475131111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260000, while the sum is 49.

The spelling of 256525475131111 in words is "two hundred fifty-six trillion, five hundred twenty-five billion, four hundred seventy-five million, one hundred thirty-one thousand, one hundred eleven".