12185243545 has 8 divisors (see below), whose sum is σ = 14623359624. Its totient is φ = 9747483264.

The previous prime is 12185243513. The next prime is 12185243557. The reversal of 12185243545 is 54534258121.

It is a happy number.

12185243545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5031049 + 12180212496 = 2243^2 + 110364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12185243545 - 2⁵ = 12185243513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12185243498 and 12185243507.

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, 6684 + ... + 156253.

It is an arithmetic number, because the mean of its divisors is an integer number (1827919953).

Almost surely, 2^12185243545 is an apocalyptic number.

It is an amenable number.

12185243545 is a deficient number, since it is larger than the sum of its proper divisors (2438116079).

12185243545 is a wasteful number, since it uses less digits than its factorization.

12185243545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177899.

The product of its digits is 192000, while the sum is 40.

The spelling of 12185243545 in words is "twelve billion, one hundred eighty-five million, two hundred forty-three thousand, five hundred forty-five".