255575777 has 2 divisors, whose sum is σ = 255575778. Its totient is φ = 255575776.

The previous prime is 255575767. The next prime is 255575779. The reversal of 255575777 is 777575552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171505216 + 84070561 = 13096^2 + 9169^2 .

It is a cyclic number.

It is not a de Polignac number, because 255575777 - 2⁶ = 255575713 is a prime.

Together with 255575779, 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 (255575779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127787888 + 127787889.

It is an arithmetic number, because the mean of its divisors is an integer number (127787889).

Almost surely, 2^255575777 is an apocalyptic number.

It is an amenable number.

255575777 is a deficient number, since it is larger than the sum of its proper divisors (1).

255575777 is an equidigital number, since it uses as much as digits as its factorization.

255575777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3001250, while the sum is 50.

The square root of 255575777 is about 15986.7375345941. The cubic root of 255575777 is about 634.6094914360.

The spelling of 255575777 in words is "two hundred fifty-five million, five hundred seventy-five thousand, seven hundred seventy-seven".