256723837495 has 4 divisors (see below), whose sum is σ = 308068605000. Its totient is φ = 205379069992.

The previous prime is 256723837459. The next prime is 256723837511. The reversal of 256723837495 is 594738327652.

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 256723837495 - 2³¹ = 254576353847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25672383745 + ... + 25672383754.

It is an arithmetic number, because the mean of its divisors is an integer number (77017151250).

Almost surely, 2^256723837495 is an apocalyptic number.

256723837495 is a deficient number, since it is larger than the sum of its proper divisors (51344767505).

256723837495 is an equidigital number, since it uses as much as digits as its factorization.

256723837495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51344767504.

The product of its digits is 76204800, while the sum is 61.

The spelling of 256723837495 in words is "two hundred fifty-six billion, seven hundred twenty-three million, eight hundred thirty-seven thousand, four hundred ninety-five".