5120665609 has 2 divisors, whose sum is σ = 5120665610. Its totient is φ = 5120665608.

The previous prime is 5120665601. The next prime is 5120665717. The reversal of 5120665609 is 9065660215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3546798025 + 1573867584 = 59555^2 + 39672^2 .

It is a cyclic number.

It is not a de Polignac number, because 5120665609 - 2³ = 5120665601 is a prime.

It is not a weakly prime, because it can be changed into another prime (5120665601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560332804 + 2560332805.

It is an arithmetic number, because the mean of its divisors is an integer number (2560332805).

Almost surely, 2^5120665609 is an apocalyptic number.

It is an amenable number.

5120665609 is a deficient number, since it is larger than the sum of its proper divisors (1).

5120665609 is an equidigital number, since it uses as much as digits as its factorization.

5120665609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 5120665609 is about 71558.8262131234. The cubic root of 5120665609 is about 1723.6224368684.

The spelling of 5120665609 in words is "five billion, one hundred twenty million, six hundred sixty-five thousand, six hundred nine".