255516778763 has 2 divisors, whose sum is σ = 255516778764. Its totient is φ = 255516778762.

The previous prime is 255516778757. The next prime is 255516778807. The reversal of 255516778763 is 367877615552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255516778763 - 2⁸ = 255516778507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255516778696 and 255516778705.

It is not a weakly prime, because it can be changed into another prime (255516775763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127758389381 + 127758389382.

It is an arithmetic number, because the mean of its divisors is an integer number (127758389382).

Almost surely, 2^255516778763 is an apocalyptic number.

255516778763 is a deficient number, since it is larger than the sum of its proper divisors (1).

255516778763 is an equidigital number, since it uses as much as digits as its factorization.

255516778763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088000, while the sum is 62.

The spelling of 255516778763 in words is "two hundred fifty-five billion, five hundred sixteen million, seven hundred seventy-eight thousand, seven hundred sixty-three".