12427326261 has 20 divisors (see below), whose sum is σ = 21216318112. Its totient is φ = 7101328968.

The previous prime is 12427326217. The next prime is 12427326277. The reversal of 12427326261 is 16262372421.

12427326261 is a `hidden beast` number, since 1 + 2 + 4 + 27 + 3 + 2 + 626 + 1 = 666.

It is not a de Polignac number, because 12427326261 - 2⁹ = 12427325749 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 (12427326211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10958275 + ... + 10959408.

Almost surely, 2^12427326261 is an apocalyptic number.

It is an amenable number.

12427326261 is a deficient number, since it is larger than the sum of its proper divisors (8788991851).

12427326261 is an equidigital number, since it uses as much as digits as its factorization.

12427326261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21917702 (or 21917693 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

Adding to 12427326261 its reverse (16262372421), we get a palindrome (28689698682).

The spelling of 12427326261 in words is "twelve billion, four hundred twenty-seven million, three hundred twenty-six thousand, two hundred sixty-one".