256893436799 has 2 divisors, whose sum is σ = 256893436800. Its totient is φ = 256893436798.

The previous prime is 256893436777. The next prime is 256893436801. The reversal of 256893436799 is 997634398652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256893436799 - 2⁸ = 256893436543 is a prime.

Together with 256893436801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256893436099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128446718399 + 128446718400.

It is an arithmetic number, because the mean of its divisors is an integer number (128446718400).

Almost surely, 2^256893436799 is an apocalyptic number.

256893436799 is a deficient number, since it is larger than the sum of its proper divisors (1).

256893436799 is an equidigital number, since it uses as much as digits as its factorization.

256893436799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529079040, while the sum is 71.

The spelling of 256893436799 in words is "two hundred fifty-six billion, eight hundred ninety-three million, four hundred thirty-six thousand, seven hundred ninety-nine".