256256545 has 8 divisors (see below), whose sum is σ = 308603880. Its totient is φ = 204274560.

The previous prime is 256256527. The next prime is 256256551. The reversal of 256256545 is 545652652.

It can be written as a sum of positive squares in 4 ways, for example, as 107806689 + 148449856 = 10383^2 + 12184^2 .

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

It is not a de Polignac number, because 256256545 - 2¹⁵ = 256223777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256256498 and 256256507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89790 + ... + 92599.

It is an arithmetic number, because the mean of its divisors is an integer number (38575485).

Almost surely, 2^256256545 is an apocalyptic number.

It is an amenable number.

256256545 is a deficient number, since it is larger than the sum of its proper divisors (52347335).

256256545 is a wasteful number, since it uses less digits than its factorization.

256256545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182675.

The product of its digits is 360000, while the sum is 40.

The square root of 256256545 is about 16008.0150237311. The cubic root of 256256545 is about 635.1724540388.

The spelling of 256256545 in words is "two hundred fifty-six million, two hundred fifty-six thousand, five hundred forty-five".