255943163977 has 2 divisors, whose sum is σ = 255943163978. Its totient is φ = 255943163976.

The previous prime is 255943163969. The next prime is 255943164049. The reversal of 255943163977 is 779361349552.

255943163977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212494262841 + 43448901136 = 460971^2 + 208444^2 .

It is a cyclic number.

It is not a de Polignac number, because 255943163977 - 2³ = 255943163969 is a prime.

It is not a weakly prime, because it can be changed into another prime (255943166977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127971581988 + 127971581989.

It is an arithmetic number, because the mean of its divisors is an integer number (127971581989).

Almost surely, 2^255943163977 is an apocalyptic number.

It is an amenable number.

255943163977 is a deficient number, since it is larger than the sum of its proper divisors (1).

255943163977 is an equidigital number, since it uses as much as digits as its factorization.

255943163977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42865200, while the sum is 61.

The spelling of 255943163977 in words is "two hundred fifty-five billion, nine hundred forty-three million, one hundred sixty-three thousand, nine hundred seventy-seven".