256532577 has 16 divisors (see below), whose sum is σ = 392189952. Its totient is φ = 146108880.

The previous prime is 256532569. The next prime is 256532603. The reversal of 256532577 is 775235652.

It is a happy number.

It is not a de Polignac number, because 256532577 - 2³ = 256532569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256532537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13449 + ... + 26342.

It is an arithmetic number, because the mean of its divisors is an integer number (24511872).

Almost surely, 2^256532577 is an apocalyptic number.

It is an amenable number.

256532577 is a deficient number, since it is larger than the sum of its proper divisors (135657375).

256532577 is a wasteful number, since it uses less digits than its factorization.

256532577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40108.

The product of its digits is 441000, while the sum is 42.

The square root of 256532577 is about 16016.6343842894. The cubic root of 256532577 is about 635.4004352179.

The spelling of 256532577 in words is "two hundred fifty-six million, five hundred thirty-two thousand, five hundred seventy-seven".