12726566562721 has 8 divisors (see below), whose sum is σ = 14700205227744. Its totient is φ = 10889040909120.

The previous prime is 12726566562683. The next prime is 12726566562811.

It is a happy number.

12726566562721 is nontrivially palindromic in base 10.

12726566562721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12726566562721 - 2²⁷ = 12726432344993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12726566562821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34028252655 + ... + 34028253028.

It is an arithmetic number, because the mean of its divisors is an integer number (1837525653468).

Almost surely, 2^{12726566562721} is an apocalyptic number.

12726566562721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12726566562721 is a deficient number, since it is larger than the sum of its proper divisors (1973638665023).

12726566562721 is a wasteful number, since it uses less digits than its factorization.

12726566562721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68056505711.

The product of its digits is 25401600, while the sum is 58.

The spelling of 12726566562721 in words is "twelve trillion, seven hundred twenty-six billion, five hundred sixty-six million, five hundred sixty-two thousand, seven hundred twenty-one".