256560773 has 8 divisors (see below), whose sum is σ = 293424960. Its totient is φ = 219749760.

The previous prime is 256560769. The next prime is 256560797. The reversal of 256560773 is 377065652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256560773 - 2² = 256560769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256560773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256560713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2348 + ... + 22773.

It is an arithmetic number, because the mean of its divisors is an integer number (36678120).

Almost surely, 2^256560773 is an apocalyptic number.

It is an amenable number.

256560773 is a deficient number, since it is larger than the sum of its proper divisors (36864187).

256560773 is a wasteful number, since it uses less digits than its factorization.

256560773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26587.

The product of its (nonzero) digits is 264600, while the sum is 41.

The square root of 256560773 is about 16017.5145699949. The cubic root of 256560773 is about 635.4237137355.

The spelling of 256560773 in words is "two hundred fifty-six million, five hundred sixty thousand, seven hundred seventy-three".