12727346657 has 4 divisors (see below), whose sum is σ = 12782924820. Its totient is φ = 12671768496.

The previous prime is 12727346641. The next prime is 12727346659. The reversal of 12727346657 is 75664372721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11243633296 + 1483713361 = 106036^2 + 38519^2 .

It is a cyclic number.

It is not a de Polignac number, because 12727346657 - 2⁴ = 12727346641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12727346659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27788738 + ... + 27789195.

It is an arithmetic number, because the mean of its divisors is an integer number (3195731205).

Almost surely, 2^12727346657 is an apocalyptic number.

It is an amenable number.

12727346657 is a deficient number, since it is larger than the sum of its proper divisors (55578163).

12727346657 is an equidigital number, since it uses as much as digits as its factorization.

12727346657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55578162.

The product of its digits is 2963520, while the sum is 50.

The spelling of 12727346657 in words is "twelve billion, seven hundred twenty-seven million, three hundred forty-six thousand, six hundred fifty-seven".