2773661161 has 2 divisors, whose sum is σ = 2773661162. Its totient is φ = 2773661160.

The previous prime is 2773661119. The next prime is 2773661257. The reversal of 2773661161 is 1611663772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2247234025 + 526427136 = 47405^2 + 22944^2 .

It is a cyclic number.

It is not a de Polignac number, because 2773661161 - 2²⁵ = 2740106729 is a prime.

It is not a weakly prime, because it can be changed into another prime (2773661861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1386830580 + 1386830581.

It is an arithmetic number, because the mean of its divisors is an integer number (1386830581).

Almost surely, 2^2773661161 is an apocalyptic number.

It is an amenable number.

2773661161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2773661161 is an equidigital number, since it uses as much as digits as its factorization.

2773661161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 2773661161 is about 52665.5595337218. The cubic root of 2773661161 is about 1405.0263477031.

The spelling of 2773661161 in words is "two billion, seven hundred seventy-three million, six hundred sixty-one thousand, one hundred sixty-one".