255663757 has 2 divisors, whose sum is σ = 255663758. Its totient is φ = 255663756.

The previous prime is 255663703. The next prime is 255663763. The reversal of 255663757 is 757366552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246458601 + 9205156 = 15699^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 255663757 - 2²⁷ = 121446029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255663257) 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, 127831878 + 127831879.

It is an arithmetic number, because the mean of its divisors is an integer number (127831879).

Almost surely, 2^255663757 is an apocalyptic number.

It is an amenable number.

255663757 is a deficient number, since it is larger than the sum of its proper divisors (1).

255663757 is an equidigital number, since it uses as much as digits as its factorization.

255663757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323000, while the sum is 46.

The square root of 255663757 is about 15989.4889536845. The cubic root of 255663757 is about 634.6823028976.

The spelling of 255663757 in words is "two hundred fifty-five million, six hundred sixty-three thousand, seven hundred fifty-seven".