12180504643 has 4 divisors (see below), whose sum is σ = 12184450920. Its totient is φ = 12176558368.

The previous prime is 12180504529. The next prime is 12180504649. The reversal of 12180504643 is 34640508121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34640508121 = 15077 ⋅2297573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12180504643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12180504599 and 12180504608.

It is not an unprimeable number, because it can be changed into a prime (12180504649) 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 3 ways as a sum of consecutive naturals, for example, 1968505 + ... + 1974682.

It is an arithmetic number, because the mean of its divisors is an integer number (3046112730).

Almost surely, 2^12180504643 is an apocalyptic number.

12180504643 is a deficient number, since it is larger than the sum of its proper divisors (3946277).

12180504643 is an equidigital number, since it uses as much as digits as its factorization.

12180504643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946276.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 12180504643 in words is "twelve billion, one hundred eighty million, five hundred four thousand, six hundred forty-three".