256789755899 has 2 divisors, whose sum is σ = 256789755900. Its totient is φ = 256789755898.

The previous prime is 256789755883. The next prime is 256789755907. The reversal of 256789755899 is 998557987652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256789755899 - 2⁴ = 256789755883 is a prime.

It is not a weakly prime, because it can be changed into another prime (256789755809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128394877949 + 128394877950.

It is an arithmetic number, because the mean of its divisors is an integer number (128394877950).

Almost surely, 2^256789755899 is an apocalyptic number.

256789755899 is a deficient number, since it is larger than the sum of its proper divisors (1).

256789755899 is an equidigital number, since it uses as much as digits as its factorization.

256789755899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216000, while the sum is 80.

The spelling of 256789755899 in words is "two hundred fifty-six billion, seven hundred eighty-nine million, seven hundred fifty-five thousand, eight hundred ninety-nine".