12747571261 has 8 divisors (see below), whose sum is σ = 13862224440. Its totient is φ = 11673451008.

The previous prime is 12747571223. The next prime is 12747571271. The reversal of 12747571261 is 16217574721.

12747571261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3647556025 + 9100015236 = 60395^2 + 95394^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12747571261 - 2²⁵ = 12714016829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12747571271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10132576 + ... + 10133833.

It is an arithmetic number, because the mean of its divisors is an integer number (1732778055).

Almost surely, 2^12747571261 is an apocalyptic number.

It is an amenable number.

12747571261 is a deficient number, since it is larger than the sum of its proper divisors (1114653179).

12747571261 is a wasteful number, since it uses less digits than its factorization.

12747571261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20266463.

The product of its digits is 164640, while the sum is 43.

The spelling of 12747571261 in words is "twelve billion, seven hundred forty-seven million, five hundred seventy-one thousand, two hundred sixty-one".