12426161161 has 4 divisors (see below), whose sum is σ = 12427758612. Its totient is φ = 12424563712.

The previous prime is 12426161147. The next prime is 12426161191. The reversal of 12426161161 is 16116162421.

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 2280635536 + 10145525625 = 47756^2 + 100725^2 .

It is a cyclic number.

It is not a de Polignac number, because 12426161161 - 2¹¹ = 12426159113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12426161191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787000 + ... + 802633.

It is an arithmetic number, because the mean of its divisors is an integer number (3106939653).

Almost surely, 2^12426161161 is an apocalyptic number.

It is an amenable number.

12426161161 is a deficient number, since it is larger than the sum of its proper divisors (1597451).

12426161161 is an equidigital number, since it uses as much as digits as its factorization.

12426161161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597450.

The product of its digits is 3456, while the sum is 31.

The spelling of 12426161161 in words is "twelve billion, four hundred twenty-six million, one hundred sixty-one thousand, one hundred sixty-one".