12606381841 has 4 divisors (see below), whose sum is σ = 13347933732. Its totient is φ = 11864829952.

The previous prime is 12606381797. The next prime is 12606381847. The reversal of 12606381841 is 14818360621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14818360621 = 37 ⋅400496233.

It can be written as a sum of positive squares in 2 ways, for example, as 5616753025 + 6989628816 = 74945^2 + 83604^2 .

It is a cyclic number.

It is not a de Polignac number, because 12606381841 - 2²⁵ = 12572827409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12606381794 and 12606381803.

It is not an unprimeable number, because it can be changed into a prime (12606381847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370775920 + ... + 370775953.

It is an arithmetic number, because the mean of its divisors is an integer number (3336983433).

Almost surely, 2^12606381841 is an apocalyptic number.

It is an amenable number.

12606381841 is a deficient number, since it is larger than the sum of its proper divisors (741551891).

12606381841 is an equidigital number, since it uses as much as digits as its factorization.

12606381841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741551890.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 12606381841 in words is "twelve billion, six hundred six million, three hundred eighty-one thousand, eight hundred forty-one".