256255577 has 2 divisors, whose sum is σ = 256255578. Its totient is φ = 256255576.

The previous prime is 256255547. The next prime is 256255591. The reversal of 256255577 is 775552652.

256255577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200618896 + 55636681 = 14164^2 + 7459^2 .

It is a cyclic number.

It is not a de Polignac number, because 256255577 - 2¹⁰ = 256254553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256255507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128127788 + 128127789.

It is an arithmetic number, because the mean of its divisors is an integer number (128127789).

Almost surely, 2^256255577 is an apocalyptic number.

It is an amenable number.

256255577 is a deficient number, since it is larger than the sum of its proper divisors (1).

256255577 is an equidigital number, since it uses as much as digits as its factorization.

256255577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 735000, while the sum is 44.

The square root of 256255577 is about 16007.9847888483. The cubic root of 256255577 is about 635.1716542574.

The spelling of 256255577 in words is "two hundred fifty-six million, two hundred fifty-five thousand, five hundred seventy-seven".