2773315861 has 2 divisors, whose sum is σ = 2773315862. Its totient is φ = 2773315860.

The previous prime is 2773315841. The next prime is 2773315889. The reversal of 2773315861 is 1685133772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2331054961 + 442260900 = 48281^2 + 21030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2773315861 - 2¹⁹ = 2772791573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2773315841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1386657930 + 1386657931.

It is an arithmetic number, because the mean of its divisors is an integer number (1386657931).

Almost surely, 2^2773315861 is an apocalyptic number.

It is an amenable number.

2773315861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2773315861 is an equidigital number, since it uses as much as digits as its factorization.

2773315861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 2773315861 is about 52662.2811982162. The cubic root of 2773315861 is about 1404.9680402046.

The spelling of 2773315861 in words is "two billion, seven hundred seventy-three million, three hundred fifteen thousand, eight hundred sixty-one".