1255768030661 has 2 divisors, whose sum is σ = 1255768030662. Its totient is φ = 1255768030660.

The previous prime is 1255768030603. The next prime is 1255768030669. The reversal of 1255768030661 is 1660308675521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816041222500 + 439726808161 = 903350^2 + 663119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255768030661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255768030669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627884015330 + 627884015331.

It is an arithmetic number, because the mean of its divisors is an integer number (627884015331).

Almost surely, 2^{1255768030661} is an apocalyptic number.

It is an amenable number.

1255768030661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255768030661 is an equidigital number, since it uses as much as digits as its factorization.

1255768030661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 1255768030661 in words is "one trillion, two hundred fifty-five billion, seven hundred sixty-eight million, thirty thousand, six hundred sixty-one".