12728376686 has 8 divisors (see below), whose sum is σ = 19922676624. Its totient is φ = 6087484480.

The previous prime is 12728376679. The next prime is 12728376737. The reversal of 12728376686 is 68667382721.

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

It is a Curzon number.

It is a congruent number.

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, 138351875 + ... + 138351966.

It is an arithmetic number, because the mean of its divisors is an integer number (2490334578).

Almost surely, 2^12728376686 is an apocalyptic number.

12728376686 is a deficient number, since it is larger than the sum of its proper divisors (7194299938).

12728376686 is a wasteful number, since it uses less digits than its factorization.

12728376686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276703866.

The product of its digits is 8128512, while the sum is 56.

The spelling of 12728376686 in words is "twelve billion, seven hundred twenty-eight million, three hundred seventy-six thousand, six hundred eighty-six".