12461926689 has 27 divisors (see below), whose sum is σ = 18205547763. Its totient is φ = 8214402672.

The previous prime is 12461926679. The next prime is 12461926691. The reversal of 12461926689 is 98662916421.

The square root of 12461926689 is 111633.

It is a perfect power (a square), and thus also a powerful number.

12461926689 is a `hidden beast` number, since 12 + 4 + 619 + 2 + 6 + 6 + 8 + 9 = 666.

12461926689 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 only one way, i.e., 11790702225 + 671224464 = 108585^2 + 25908^2 .

It is not a de Polignac number, because 12461926689 - 2⁵ = 12461926657 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12461926669) 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 26 ways as a sum of consecutive naturals, for example, 42532027 + ... + 42532319.

Almost surely, 2^12461926689 is an apocalyptic number.

12461926689 is the 111633-rd square number.

12461926689 is the 55817-th centered octagonal number.

It is an amenable number.

12461926689 is a deficient number, since it is larger than the sum of its proper divisors (5743621074).

12461926689 is an frugal number, since it uses more digits than its factorization.

12461926689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 423 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 12461926689 in words is "twelve billion, four hundred sixty-one million, nine hundred twenty-six thousand, six hundred eighty-nine".