256512240587 has 2 divisors, whose sum is σ = 256512240588. Its totient is φ = 256512240586.

The previous prime is 256512240533. The next prime is 256512240613. The reversal of 256512240587 is 785042215652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256512240587 - 2⁸ = 256512240331 is a prime.

It is not a weakly prime, because it can be changed into another prime (256512240527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128256120293 + 128256120294.

It is an arithmetic number, because the mean of its divisors is an integer number (128256120294).

Almost surely, 2^256512240587 is an apocalyptic number.

256512240587 is a deficient number, since it is larger than the sum of its proper divisors (1).

256512240587 is an equidigital number, since it uses as much as digits as its factorization.

256512240587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 256512240587 in words is "two hundred fifty-six billion, five hundred twelve million, two hundred forty thousand, five hundred eighty-seven".