12724637766321 has 16 divisors (see below), whose sum is σ = 18272737494144. Its totient is φ = 7829919423744.

The previous prime is 12724637766257. The next prime is 12724637766329. The reversal of 12724637766321 is 12366773642721.

12724637766321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12724637766321 - 2⁶ = 12724637766257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12724637766329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12566661 + ... + 13541426.

It is an arithmetic number, because the mean of its divisors is an integer number (1142046093384).

Almost surely, 2^{12724637766321} is an apocalyptic number.

It is an amenable number.

12724637766321 is a deficient number, since it is larger than the sum of its proper divisors (5548099727823).

12724637766321 is a wasteful number, since it uses less digits than its factorization.

12724637766321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26120600.

The product of its digits is 21337344, while the sum is 57.

The spelling of 12724637766321 in words is "twelve trillion, seven hundred twenty-four billion, six hundred thirty-seven million, seven hundred sixty-six thousand, three hundred twenty-one".