12138662506 has 8 divisors (see below), whose sum is σ = 19166309280. Its totient is φ = 5749892748.

The previous prime is 12138662479. The next prime is 12138662527. The reversal of 12138662506 is 60526683121.

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, 159719206 + ... + 159719281.

It is an arithmetic number, because the mean of its divisors is an integer number (2395788660).

Almost surely, 2^12138662506 is an apocalyptic number.

12138662506 is a deficient number, since it is larger than the sum of its proper divisors (7027646774).

12138662506 is a wasteful number, since it uses less digits than its factorization.

12138662506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319438508.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 12138662506 in words is "twelve billion, one hundred thirty-eight million, six hundred sixty-two thousand, five hundred six".