256366853 has 2 divisors, whose sum is σ = 256366854. Its totient is φ = 256366852.

The previous prime is 256366823. The next prime is 256366909. The reversal of 256366853 is 358663652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252110884 + 4255969 = 15878^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 256366853 - 2²⁶ = 189257989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256366823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128183426 + 128183427.

It is an arithmetic number, because the mean of its divisors is an integer number (128183427).

Almost surely, 2^256366853 is an apocalyptic number.

It is an amenable number.

256366853 is a deficient number, since it is larger than the sum of its proper divisors (1).

256366853 is an equidigital number, since it uses as much as digits as its factorization.

256366853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 44.

The square root of 256366853 is about 16011.4600521002. The cubic root of 256366853 is about 635.2635795841.

The spelling of 256366853 in words is "two hundred fifty-six million, three hundred sixty-six thousand, eight hundred fifty-three".