255061685777 has 2 divisors, whose sum is σ = 255061685778. Its totient is φ = 255061685776.

The previous prime is 255061685737. The next prime is 255061685779. The reversal of 255061685777 is 777586160552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163591127296 + 91470558481 = 404464^2 + 302441^2 .

It is a cyclic number.

It is not a de Polignac number, because 255061685777 - 2⁶ = 255061685713 is a prime.

Together with 255061685779, 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 (255061685779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127530842888 + 127530842889.

It is an arithmetic number, because the mean of its divisors is an integer number (127530842889).

Almost surely, 2^255061685777 is an apocalyptic number.

It is an amenable number.

255061685777 is a deficient number, since it is larger than the sum of its proper divisors (1).

255061685777 is an equidigital number, since it uses as much as digits as its factorization.

255061685777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696000, while the sum is 59.

The spelling of 255061685777 in words is "two hundred fifty-five billion, sixty-one million, six hundred eighty-five thousand, seven hundred seventy-seven".