256590474587 has 2 divisors, whose sum is σ = 256590474588. Its totient is φ = 256590474586.

The previous prime is 256590474551. The next prime is 256590474607. The reversal of 256590474587 is 785474095652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256590474587 - 2¹² = 256590470491 is a prime.

It is not a weakly prime, because it can be changed into another prime (256590474187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128295237293 + 128295237294.

It is an arithmetic number, because the mean of its divisors is an integer number (128295237294).

Almost surely, 2^256590474587 is an apocalyptic number.

256590474587 is a deficient number, since it is larger than the sum of its proper divisors (1).

256590474587 is an equidigital number, since it uses as much as digits as its factorization.

256590474587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672000, while the sum is 62.

The spelling of 256590474587 in words is "two hundred fifty-six billion, five hundred ninety million, four hundred seventy-four thousand, five hundred eighty-seven".