12164457517 has 4 divisors (see below), whose sum is σ = 12191550300. Its totient is φ = 12137364736.

The previous prime is 12164457499. The next prime is 12164457541. The reversal of 12164457517 is 71575446121.

12164457517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7497654921 + 4666802596 = 86589^2 + 68314^2 .

It is a cyclic number.

It is not a de Polignac number, because 12164457517 - 2¹¹ = 12164455469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12164457317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13545718 + ... + 13546615.

It is an arithmetic number, because the mean of its divisors is an integer number (3047887575).

Almost surely, 2^12164457517 is an apocalyptic number.

It is an amenable number.

12164457517 is a deficient number, since it is larger than the sum of its proper divisors (27092783).

12164457517 is an equidigital number, since it uses as much as digits as its factorization.

12164457517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27092782.

The product of its digits is 235200, while the sum is 43.

The spelling of 12164457517 in words is "twelve billion, one hundred sixty-four million, four hundred fifty-seven thousand, five hundred seventeen".