12185001816 has 32 divisors (see below), whose sum is σ = 32805774960. Its totient is φ = 3749231232.

The previous prime is 12185001781. The next prime is 12185001823. The reversal of 12185001816 is 61810058121.

12185001816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19526935 + ... + 19527558.

Almost surely, 2^12185001816 is an apocalyptic number.

It is an amenable number.

12185001816 is an abundant number, since it is smaller than the sum of its proper divisors (20620773144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12185001816 is a wasteful number, since it uses less digits than its factorization.

12185001816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39054515 (or 39054511 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 33.

Adding to 12185001816 its reverse (61810058121), we get a palindrome (73995059937).

The spelling of 12185001816 in words is "twelve billion, one hundred eighty-five million, one thousand, eight hundred sixteen".