256477031724751 has 4 divisors (see below), whose sum is σ = 271563915943872. Its totient is φ = 241390147505632.

The previous prime is 256477031724673. The next prime is 256477031724779. The reversal of 256477031724751 is 157427130774652.

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 256477031724751 - 2⁷ = 256477031724623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256477031724751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256477031824751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7543442109535 + ... + 7543442109568.

It is an arithmetic number, because the mean of its divisors is an integer number (67890978985968).

Almost surely, 2^{256477031724751} is an apocalyptic number.

256477031724751 is a deficient number, since it is larger than the sum of its proper divisors (15086884219121).

256477031724751 is a wasteful number, since it uses less digits than its factorization.

256477031724751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15086884219120.

The product of its (nonzero) digits is 69148800, while the sum is 61.

The spelling of 256477031724751 in words is "two hundred fifty-six trillion, four hundred seventy-seven billion, thirty-one million, seven hundred twenty-four thousand, seven hundred fifty-one".