255786505567 has 2 divisors, whose sum is σ = 255786505568. Its totient is φ = 255786505566.

The previous prime is 255786505529. The next prime is 255786505589. The reversal of 255786505567 is 765505687552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255786505567 - 2⁷ = 255786505439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255786502567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127893252783 + 127893252784.

It is an arithmetic number, because the mean of its divisors is an integer number (127893252784).

Almost surely, 2^255786505567 is an apocalyptic number.

255786505567 is a deficient number, since it is larger than the sum of its proper divisors (1).

255786505567 is an equidigital number, since it uses as much as digits as its factorization.

255786505567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200000, while the sum is 61.

The spelling of 255786505567 in words is "two hundred fifty-five billion, seven hundred eighty-six million, five hundred five thousand, five hundred sixty-seven".