256742076656003 has 4 divisors (see below), whose sum is σ = 257517732477048. Its totient is φ = 255966420834960.

The previous prime is 256742076655927. The next prime is 256742076656041. The reversal of 256742076656003 is 300656670247652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256742076656003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256742076656063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387827910026 + ... + 387827910687.

It is an arithmetic number, because the mean of its divisors is an integer number (64379433119262).

Almost surely, 2^{256742076656003} is an apocalyptic number.

256742076656003 is a deficient number, since it is larger than the sum of its proper divisors (775655821045).

256742076656003 is an equidigital number, since it uses as much as digits as its factorization.

256742076656003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775655821044.

The product of its (nonzero) digits is 76204800, while the sum is 59.

The spelling of 256742076656003 in words is "two hundred fifty-six trillion, seven hundred forty-two billion, seventy-six million, six hundred fifty-six thousand, three".