12187879528 has 16 divisors (see below), whose sum is σ = 24929753760. Its totient is φ = 5539945200.

The previous prime is 12187879499. The next prime is 12187879541. The reversal of 12187879528 is 82597878121.

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, 69249228 + ... + 69249403.

It is an arithmetic number, because the mean of its divisors is an integer number (1558109610).

Almost surely, 2^12187879528 is an apocalyptic number.

It is an amenable number.

12187879528 is an abundant number, since it is smaller than the sum of its proper divisors (12741874232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12187879528 is a wasteful number, since it uses less digits than its factorization.

12187879528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138498648 (or 138498644 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 58.

The spelling of 12187879528 in words is "twelve billion, one hundred eighty-seven million, eight hundred seventy-nine thousand, five hundred twenty-eight".