12539546649 has 24 divisors (see below), whose sum is σ = 20731032192. Its totient is φ = 7154784000.

The previous prime is 12539546629. The next prime is 12539546653. The reversal of 12539546649 is 94664593521.

12539546649 is a `hidden beast` number, since 1 + 2 + 5 + 39 + 546 + 64 + 9 = 666.

12539546649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12539546649 - 2⁷ = 12539546521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12539546595 and 12539546604.

It is not an unprimeable number, because it can be changed into a prime (12539546629) 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 23 ways as a sum of consecutive naturals, for example, 105477 + ... + 190274.

It is an arithmetic number, because the mean of its divisors is an integer number (863793008).

Almost surely, 2^12539546649 is an apocalyptic number.

It is an amenable number.

12539546649 is a deficient number, since it is larger than the sum of its proper divisors (8191485543).

12539546649 is a wasteful number, since it uses less digits than its factorization.

12539546649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296437 (or 296434 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The spelling of 12539546649 in words is "twelve billion, five hundred thirty-nine million, five hundred forty-six thousand, six hundred forty-nine".