2845722809 has 2 divisors, whose sum is σ = 2845722810. Its totient is φ = 2845722808.

The previous prime is 2845722709. The next prime is 2845722827. The reversal of 2845722809 is 9082275482.

2845722809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2178275584 + 667447225 = 46672^2 + 25835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2845722809 - 2⁸ = 2845722553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2845722829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1422861404 + 1422861405.

It is an arithmetic number, because the mean of its divisors is an integer number (1422861405).

Almost surely, 2^2845722809 is an apocalyptic number.

It is an amenable number.

2845722809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2845722809 is an equidigital number, since it uses as much as digits as its factorization.

2845722809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 2845722809 is about 53345.3166547917. The cubic root of 2845722809 is about 1417.0903206171.

The spelling of 2845722809 in words is "two billion, eight hundred forty-five million, seven hundred twenty-two thousand, eight hundred nine".