256610441 has 2 divisors, whose sum is σ = 256610442. Its totient is φ = 256610440.

The previous prime is 256610423. The next prime is 256610443. The reversal of 256610441 is 144016652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255072841 + 1537600 = 15971^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 256610441 - 2¹⁰ = 256609417 is a prime.

Together with 256610443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256610443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128305220 + 128305221.

It is an arithmetic number, because the mean of its divisors is an integer number (128305221).

Almost surely, 2^256610441 is an apocalyptic number.

It is an amenable number.

256610441 is a deficient number, since it is larger than the sum of its proper divisors (1).

256610441 is an equidigital number, since it uses as much as digits as its factorization.

256610441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 256610441 is about 16019.0649227725. The cubic root of 256610441 is about 635.4647153122.

The spelling of 256610441 in words is "two hundred fifty-six million, six hundred ten thousand, four hundred forty-one".