12543386506 has 8 divisors (see below), whose sum is σ = 21502948320. Its totient is φ = 5375737068.

The previous prime is 12543386459. The next prime is 12543386543. The reversal of 12543386506 is 60568334521.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447978076 + ... + 447978103.

It is an arithmetic number, because the mean of its divisors is an integer number (2687868540).

Almost surely, 2^12543386506 is an apocalyptic number.

12543386506 is a deficient number, since it is larger than the sum of its proper divisors (8959561814).

12543386506 is an equidigital number, since it uses as much as digits as its factorization.

12543386506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895956188.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 12543386506 in words is "twelve billion, five hundred forty-three million, three hundred eighty-six thousand, five hundred six".