12135544844 has 12 divisors (see below), whose sum is σ = 21348394368. Its totient is φ = 6036003600.

The previous prime is 12135544819. The next prime is 12135544873. The reversal of 12135544844 is 44844553121.

It is a happy 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, 7941347 + ... + 7942874.

It is an arithmetic number, because the mean of its divisors is an integer number (1779032864).

Almost surely, 2^12135544844 is an apocalyptic number.

It is an amenable number.

12135544844 is a deficient number, since it is larger than the sum of its proper divisors (9212849524).

12135544844 is a wasteful number, since it uses less digits than its factorization.

12135544844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15884416 (or 15884414 counting only the distinct ones).

The product of its digits is 307200, while the sum is 41.

The spelling of 12135544844 in words is "twelve billion, one hundred thirty-five million, five hundred forty-four thousand, eight hundred forty-four".