12105543506 has 16 divisors (see below), whose sum is σ = 20826218880. Its totient is φ = 5169625440.

The previous prime is 12105543497. The next prime is 12105543529. The reversal of 12105543506 is 60534550121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1534646 + ... + 1542513.

It is an arithmetic number, because the mean of its divisors is an integer number (1301638680).

Almost surely, 2^12105543506 is an apocalyptic number.

12105543506 is a deficient number, since it is larger than the sum of its proper divisors (8720675374).

12105543506 is a wasteful number, since it uses less digits than its factorization.

12105543506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077449.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 12105543506 in words is "twelve billion, one hundred five million, five hundred forty-three thousand, five hundred six".