256523754377 has 4 divisors (see below), whose sum is σ = 279844095696. Its totient is φ = 233203413060.

The previous prime is 256523754367. The next prime is 256523754379. The reversal of 256523754377 is 773457325652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256523754377 - 2⁸ = 256523754121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256523754379) 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, 11660170643 + ... + 11660170664.

It is an arithmetic number, because the mean of its divisors is an integer number (69961023924).

Almost surely, 2^256523754377 is an apocalyptic number.

It is an amenable number.

256523754377 is a deficient number, since it is larger than the sum of its proper divisors (23320341319).

256523754377 is a wasteful number, since it uses less digits than its factorization.

256523754377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23320341318.

The product of its digits is 37044000, while the sum is 56.

The spelling of 256523754377 in words is "two hundred fifty-six billion, five hundred twenty-three million, seven hundred fifty-four thousand, three hundred seventy-seven".