2851788809 has 2 divisors, whose sum is σ = 2851788810. Its totient is φ = 2851788808.

The previous prime is 2851788787. The next prime is 2851788827. The reversal of 2851788809 is 9088871582.

2851788809 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., 2613765625 + 238023184 = 51125^2 + 15428^2 .

It is a cyclic number.

It is not a de Polignac number, because 2851788809 - 2⁸ = 2851788553 is a prime.

It is a super-2 number, since 2×2851788809² = 16265398822275276962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2851788889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1425894404 + 1425894405.

It is an arithmetic number, because the mean of its divisors is an integer number (1425894405).

Almost surely, 2^2851788809 is an apocalyptic number.

It is an amenable number.

2851788809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2851788809 is an equidigital number, since it uses as much as digits as its factorization.

2851788809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2580480, while the sum is 56.

The square root of 2851788809 is about 53402.1423633921. The cubic root of 2851788809 is about 1418.0965054346.

The spelling of 2851788809 in words is "two billion, eight hundred fifty-one million, seven hundred eighty-eight thousand, eight hundred nine".