12188185844 has 6 divisors (see below), whose sum is σ = 21329325234. Its totient is φ = 6094092920.

The previous prime is 12188185843. The next prime is 12188185847. The reversal of 12188185844 is 44858188121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11111689744 + 1076496100 = 105412^2 + 32810^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12188185792 and 12188185801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12188185843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1523523227 + ... + 1523523234.

It is an arithmetic number, because the mean of its divisors is an integer number (3554887539).

Almost surely, 2^12188185844 is an apocalyptic number.

It is an amenable number.

12188185844 is a deficient number, since it is larger than the sum of its proper divisors (9141139390).

12188185844 is a wasteful number, since it uses less digits than its factorization.

12188185844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047046465 (or 3047046463 counting only the distinct ones).

The product of its digits is 655360, while the sum is 50.

The spelling of 12188185844 in words is "twelve billion, one hundred eighty-eight million, one hundred eighty-five thousand, eight hundred forty-four".