12143545685 has 4 divisors (see below), whose sum is σ = 14572254828. Its totient is φ = 9714836544.

The previous prime is 12143545679. The next prime is 12143545691. The reversal of 12143545685 is 58654534121.

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

It is an interprime number because it is at equal distance from previous prime (12143545679) and next prime (12143545691).

It can be written as a sum of positive squares in 2 ways, for example, as 6223474321 + 5920071364 = 78889^2 + 76942^2 .

It is a cyclic number.

It is not a de Polignac number, because 12143545685 - 2²⁰ = 12142497109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214354564 + ... + 1214354573.

It is an arithmetic number, because the mean of its divisors is an integer number (3643063707).

Almost surely, 2^12143545685 is an apocalyptic number.

It is an amenable number.

12143545685 is a deficient number, since it is larger than the sum of its proper divisors (2428709143).

12143545685 is an equidigital number, since it uses as much as digits as its factorization.

12143545685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428709142.

The product of its digits is 576000, while the sum is 44.

The spelling of 12143545685 in words is "twelve billion, one hundred forty-three million, five hundred forty-five thousand, six hundred eighty-five".