6172116509 has 8 divisors (see below), whose sum is σ = 7037888760. Its totient is φ = 5362200576.

The previous prime is 6172116497. The next prime is 6172116527. The reversal of 6172116509 is 9056112716.

It can be written as a sum of positive squares in 4 ways, for example, as 2534820409 + 3637296100 = 50347^2 + 60310^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6172116509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6172116569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13963844 + ... + 13964285.

It is an arithmetic number, because the mean of its divisors is an integer number (879736095).

Almost surely, 2^6172116509 is an apocalyptic number.

It is an amenable number.

6172116509 is a deficient number, since it is larger than the sum of its proper divisors (865772251).

6172116509 is a wasteful number, since it uses less digits than its factorization.

6172116509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27928159.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 6172116509 is about 78562.8188712701. The cubic root of 6172116509 is about 1834.3324058454.

The spelling of 6172116509 in words is "six billion, one hundred seventy-two million, one hundred sixteen thousand, five hundred nine".