255755777 has 2 divisors, whose sum is σ = 255755778. Its totient is φ = 255755776.

The previous prime is 255755771. The next prime is 255755779. The reversal of 255755777 is 777557552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253319056 + 2436721 = 15916^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 255755777 - 2¹⁰ = 255754753 is a prime.

It is a super-2 number, since 2×255755777² = 130822034937747458, which contains 22 as substring.

Together with 255755779, 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 (255755771) 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, 127877888 + 127877889.

It is an arithmetic number, because the mean of its divisors is an integer number (127877889).

Almost surely, 2^255755777 is an apocalyptic number.

It is an amenable number.

255755777 is a deficient number, since it is larger than the sum of its proper divisors (1).

255755777 is an equidigital number, since it uses as much as digits as its factorization.

255755777 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 255755777 is about 15992.3662101641. The cubic root of 255755777 is about 634.7584399570.

The spelling of 255755777 in words is "two hundred fifty-five million, seven hundred fifty-five thousand, seven hundred seventy-seven".