12724709128 has 32 divisors (see below), whose sum is σ = 24649067520. Its totient is φ = 6151968000.

The previous prime is 12724709087. The next prime is 12724709131. The reversal of 12724709128 is 82190742721.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284448 + ... + 326128.

It is an arithmetic number, because the mean of its divisors is an integer number (770283360).

Almost surely, 2^12724709128 is an apocalyptic number.

It is an amenable number.

12724709128 is a deficient number, since it is larger than the sum of its proper divisors (11924358392).

12724709128 is a wasteful number, since it uses less digits than its factorization.

12724709128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42949 (or 42945 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 12724709128 in words is "twelve billion, seven hundred twenty-four million, seven hundred nine thousand, one hundred twenty-eight".