12866592161 has 4 divisors (see below), whose sum is σ = 13180411524. Its totient is φ = 12552772800.

The previous prime is 12866592133. The next prime is 12866592203. The reversal of 12866592161 is 16129566821.

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 620956561 + 12245635600 = 24919^2 + 110660^2 .

It is a cyclic number.

It is not a de Polignac number, because 12866592161 - 2¹⁸ = 12866330017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12866502161) 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, 156909620 + ... + 156909701.

It is an arithmetic number, because the mean of its divisors is an integer number (3295102881).

Almost surely, 2^12866592161 is an apocalyptic number.

It is an amenable number.

12866592161 is a deficient number, since it is larger than the sum of its proper divisors (313819363).

12866592161 is an equidigital number, since it uses as much as digits as its factorization.

12866592161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313819362.

The product of its digits is 311040, while the sum is 47.

The spelling of 12866592161 in words is "twelve billion, eight hundred sixty-six million, five hundred ninety-two thousand, one hundred sixty-one".