5172166509 has 16 divisors (see below), whose sum is σ = 6950395200. Its totient is φ = 3421057536.

The previous prime is 5172166499. The next prime is 5172166541. The reversal of 5172166509 is 9056612715.

It is not a de Polignac number, because 5172166509 - 2⁵ = 5172166477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5172166579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843037 + ... + 849149.

It is an arithmetic number, because the mean of its divisors is an integer number (434399700).

Almost surely, 2^5172166509 is an apocalyptic number.

It is an amenable number.

5172166509 is a deficient number, since it is larger than the sum of its proper divisors (1778228691).

5172166509 is a wasteful number, since it uses less digits than its factorization.

5172166509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284.

The product of its (nonzero) digits is 113400, while the sum is 42.

The square root of 5172166509 is about 71917.7760292961. The cubic root of 5172166509 is about 1729.3815947131.

The spelling of 5172166509 in words is "five billion, one hundred seventy-two million, one hundred sixty-six thousand, five hundred nine".