255606371777 has 2 divisors, whose sum is σ = 255606371778. Its totient is φ = 255606371776.

The previous prime is 255606371773. The next prime is 255606371789. The reversal of 255606371777 is 777173606552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176487370816 + 79119000961 = 420104^2 + 281281^2 .

It is a cyclic number.

It is not a de Polignac number, because 255606371777 - 2² = 255606371773 is a prime.

It is not a weakly prime, because it can be changed into another prime (255606371773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127803185888 + 127803185889.

It is an arithmetic number, because the mean of its divisors is an integer number (127803185889).

Almost surely, 2^255606371777 is an apocalyptic number.

It is an amenable number.

255606371777 is a deficient number, since it is larger than the sum of its proper divisors (1).

255606371777 is an equidigital number, since it uses as much as digits as its factorization.

255606371777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12965400, while the sum is 56.

The spelling of 255606371777 in words is "two hundred fifty-five billion, six hundred six million, three hundred seventy-one thousand, seven hundred seventy-seven".