256744300793 has 4 divisors (see below), whose sum is σ = 271846906740. Its totient is φ = 241641694848.

The previous prime is 256744300781. The next prime is 256744300817. The reversal of 256744300793 is 397003447652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183756254224 + 72988046569 = 428668^2 + 270163^2 .

It is not a de Polignac number, because 256744300793 - 2⁴ = 256744300777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256744300753) 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, 7551302948 + ... + 7551302981.

It is an arithmetic number, because the mean of its divisors is an integer number (67961726685).

Almost surely, 2^256744300793 is an apocalyptic number.

It is an amenable number.

256744300793 is a deficient number, since it is larger than the sum of its proper divisors (15102605947).

256744300793 is a wasteful number, since it uses less digits than its factorization.

256744300793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15102605946.

The product of its (nonzero) digits is 3810240, while the sum is 50.

The spelling of 256744300793 in words is "two hundred fifty-six billion, seven hundred forty-four million, three hundred thousand, seven hundred ninety-three".