256695383423 has 4 divisors (see below), whose sum is σ = 259341727680. Its totient is φ = 254049039168.

The previous prime is 256695383419. The next prime is 256695383437. The reversal of 256695383423 is 324383596652.

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 256695383423 - 2² = 256695383419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256695383453) 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, 1323171983 + ... + 1323172176.

It is an arithmetic number, because the mean of its divisors is an integer number (64835431920).

Almost surely, 2^256695383423 is an apocalyptic number.

256695383423 is a deficient number, since it is larger than the sum of its proper divisors (2646344257).

256695383423 is an equidigital number, since it uses as much as digits as its factorization.

256695383423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646344256.

The product of its digits is 27993600, while the sum is 56.

The spelling of 256695383423 in words is "two hundred fifty-six billion, six hundred ninety-five million, three hundred eighty-three thousand, four hundred twenty-three".