12161685813 has 16 divisors (see below), whose sum is σ = 17072632320. Its totient is φ = 7679444976.

The previous prime is 12161685797. The next prime is 12161685817. The reversal of 12161685813 is 31858616121.

12161685813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12161685813 - 2⁴ = 12161685797 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 (12161685817) 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 15 ways as a sum of consecutive naturals, for example, 287256 + ... + 326862.

It is an arithmetic number, because the mean of its divisors is an integer number (1067039520).

Almost surely, 2^12161685813 is an apocalyptic number.

It is an amenable number.

12161685813 is a deficient number, since it is larger than the sum of its proper divisors (4910946507).

12161685813 is a wasteful number, since it uses less digits than its factorization.

12161685813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45016.

The product of its digits is 69120, while the sum is 42.

The spelling of 12161685813 in words is "twelve billion, one hundred sixty-one million, six hundred eighty-five thousand, eight hundred thirteen".