12728540648672 has 36 divisors (see below), whose sum is σ = 26620102169640. Its totient is φ = 5989901477376.

The previous prime is 12728540648669. The next prime is 12728540648717. The reversal of 12728540648672 is 27684604582721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688168772 + ... + 688187267.

It is an arithmetic number, because the mean of its divisors is an integer number (739447282490).

Almost surely, 2^{12728540648672} is an apocalyptic number.

It is an amenable number.

12728540648672 is an abundant number, since it is smaller than the sum of its proper divisors (13891561520968).

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

12728540648672 is a wasteful number, since it uses less digits than its factorization.

12728540648672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376356083 (or 1376356058 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 62.

The spelling of 12728540648672 in words is "twelve trillion, seven hundred twenty-eight billion, five hundred forty million, six hundred forty-eight thousand, six hundred seventy-two".