256507244213603 has 4 divisors (see below), whose sum is σ = 256507930210488. Its totient is φ = 256506558216720.

The previous prime is 256507244213587. The next prime is 256507244213609. The reversal of 256507244213603 is 306312442705652.

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

It is a cyclic number.

It is not a de Polignac number, because 256507244213603 - 2⁴ = 256507244213587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256507244213609) 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, 342437258 + ... + 343185503.

It is an arithmetic number, because the mean of its divisors is an integer number (64126982552622).

Almost surely, 2^{256507244213603} is an apocalyptic number.

256507244213603 is a deficient number, since it is larger than the sum of its proper divisors (685996885).

256507244213603 is an equidigital number, since it uses as much as digits as its factorization.

256507244213603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685996884.

The product of its (nonzero) digits is 7257600, while the sum is 50.

The spelling of 256507244213603 in words is "two hundred fifty-six trillion, five hundred seven billion, two hundred forty-four million, two hundred thirteen thousand, six hundred three".