256744425500273 has 4 divisors (see below), whose sum is σ = 258228497324148. Its totient is φ = 255260353676400.

The previous prime is 256744425500249. The next prime is 256744425500347. The reversal of 256744425500273 is 372005524447652.

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 195160117680784 + 61584307819489 = 13969972^2 + 7847567^2 .

It is a cyclic number.

It is not a de Polignac number, because 256744425500273 - 2¹⁸ = 256744425238129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256744425500203) 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, 742035911678 + ... + 742035912023.

It is an arithmetic number, because the mean of its divisors is an integer number (64557124331037).

Almost surely, 2^{256744425500273} is an apocalyptic number.

It is an amenable number.

256744425500273 is a deficient number, since it is larger than the sum of its proper divisors (1484071823875).

256744425500273 is a wasteful number, since it uses less digits than its factorization.

256744425500273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484071823874.

The product of its (nonzero) digits is 56448000, while the sum is 56.

The spelling of 256744425500273 in words is "two hundred fifty-six trillion, seven hundred forty-four billion, four hundred twenty-five million, five hundred thousand, two hundred seventy-three".