6509116209 has 16 divisors (see below), whose sum is σ = 8795531264. Its totient is φ = 4281368400.

The previous prime is 6509116181. The next prime is 6509116241. The reversal of 6509116209 is 9026119056.

It is not a de Polignac number, because 6509116209 - 2¹³ = 6509108017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6509116249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44874 + ... + 122604.

It is an arithmetic number, because the mean of its divisors is an integer number (549720704).

Almost surely, 2^6509116209 is an apocalyptic number.

It is an amenable number.

6509116209 is a deficient number, since it is larger than the sum of its proper divisors (2286415055).

6509116209 is a wasteful number, since it uses less digits than its factorization.

6509116209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78108.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 6509116209 is about 80679.0940021019. The cubic root of 6509116209 is about 1867.1276414070.

The spelling of 6509116209 in words is "six billion, five hundred nine million, one hundred sixteen thousand, two hundred nine".