256444667255 has 8 divisors (see below), whose sum is σ = 351695543712. Its totient is φ = 175847771808.

The previous prime is 256444667183. The next prime is 256444667287. The reversal of 256444667255 is 552766444652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256444667255 - 2⁸ = 256444666999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256444667255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3663495212 + ... + 3663495281.

It is an arithmetic number, because the mean of its divisors is an integer number (43961942964).

Almost surely, 2^256444667255 is an apocalyptic number.

256444667255 is a deficient number, since it is larger than the sum of its proper divisors (95250876457).

256444667255 is an equidigital number, since it uses as much as digits as its factorization.

256444667255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326990505.

The product of its digits is 48384000, while the sum is 56.

The spelling of 256444667255 in words is "two hundred fifty-six billion, four hundred forty-four million, six hundred sixty-seven thousand, two hundred fifty-five".