255516751757 has 2 divisors, whose sum is σ = 255516751758. Its totient is φ = 255516751756.

The previous prime is 255516751709. The next prime is 255516751801. The reversal of 255516751757 is 757157615552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151232320996 + 104284430761 = 388886^2 + 322931^2 .

It is a cyclic number.

It is not a de Polignac number, because 255516751757 - 2³⁴ = 238336882573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255516711757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127758375878 + 127758375879.

It is an arithmetic number, because the mean of its divisors is an integer number (127758375879).

Almost surely, 2^255516751757 is an apocalyptic number.

It is an amenable number.

255516751757 is a deficient number, since it is larger than the sum of its proper divisors (1).

255516751757 is an equidigital number, since it uses as much as digits as its factorization.

255516751757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12862500, while the sum is 56.

The spelling of 255516751757 in words is "two hundred fifty-five billion, five hundred sixteen million, seven hundred fifty-one thousand, seven hundred fifty-seven".