12185502147 has 72 divisors (see below), whose sum is σ = 21839220000. Its totient is φ = 6410686464.

The previous prime is 12185502139. The next prime is 12185502163. The reversal of 12185502147 is 74120558121.

It is a happy number.

12185502147 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 5 + 502 + 147 = 666.

It is not a de Polignac number, because 12185502147 - 2³ = 12185502139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12185502647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4779229 + ... + 4781777.

It is an arithmetic number, because the mean of its divisors is an integer number (303322500).

Almost surely, 2^12185502147 is an apocalyptic number.

12185502147 is a deficient number, since it is larger than the sum of its proper divisors (9653717853).

12185502147 is a wasteful number, since it uses less digits than its factorization.

12185502147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 12185502147 in words is "twelve billion, one hundred eighty-five million, five hundred two thousand, one hundred forty-seven".