255005664161 has 2 divisors, whose sum is σ = 255005664162. Its totient is φ = 255005664160.

The previous prime is 255005664157. The next prime is 255005664167. The reversal of 255005664161 is 161466500552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219187830625 + 35817833536 = 468175^2 + 189256^2 .

It is a cyclic number.

It is not a de Polignac number, because 255005664161 - 2² = 255005664157 is a prime.

It is not a weakly prime, because it can be changed into another prime (255005664167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127502832080 + 127502832081.

It is an arithmetic number, because the mean of its divisors is an integer number (127502832081).

Almost surely, 2^255005664161 is an apocalyptic number.

It is an amenable number.

255005664161 is a deficient number, since it is larger than the sum of its proper divisors (1).

255005664161 is an equidigital number, since it uses as much as digits as its factorization.

255005664161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 255005664161 in words is "two hundred fifty-five billion, five million, six hundred sixty-four thousand, one hundred sixty-one".