256623235742243 has 16 divisors (see below), whose sum is σ = 271056717273600. Its totient is φ = 242283852439200.

The previous prime is 256623235742233. The next prime is 256623235742311. The reversal of 256623235742243 is 342247532326652.

256623235742243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 256623235742243 - 2⁴ = 256623235742227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256623235742233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12820283 + ... + 26030868.

It is an arithmetic number, because the mean of its divisors is an integer number (16941044829600).

Almost surely, 2^{256623235742243} is an apocalyptic number.

256623235742243 is a deficient number, since it is larger than the sum of its proper divisors (14433481531357).

256623235742243 is a wasteful number, since it uses less digits than its factorization.

256623235742243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38852362.

The product of its digits is 87091200, while the sum is 56.

The spelling of 256623235742243 in words is "two hundred fifty-six trillion, six hundred twenty-three billion, two hundred thirty-five million, seven hundred forty-two thousand, two hundred forty-three".