5116785809 has 2 divisors, whose sum is σ = 5116785810. Its totient is φ = 5116785808.

The previous prime is 5116785769. The next prime is 5116785811. The reversal of 5116785809 is 9085876115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4786564225 + 330221584 = 69185^2 + 18172^2 .

It is a cyclic number.

It is not a de Polignac number, because 5116785809 - 2¹² = 5116781713 is a prime.

Together with 5116785811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5118785809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2558392904 + 2558392905.

It is an arithmetic number, because the mean of its divisors is an integer number (2558392905).

Almost surely, 2^5116785809 is an apocalyptic number.

It is an amenable number.

5116785809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5116785809 is an equidigital number, since it uses as much as digits as its factorization.

5116785809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 50.

The square root of 5116785809 is about 71531.7119115711. The cubic root of 5116785809 is about 1723.1870117050.

The spelling of 5116785809 in words is "five billion, one hundred sixteen million, seven hundred eighty-five thousand, eight hundred nine".