13105517049 has 12 divisors (see below), whose sum is σ = 19582956900. Its totient is φ = 8435734944.

The previous prime is 13105517027. The next prime is 13105517057. The reversal of 13105517049 is 94071550131.

It is a happy number.

13105517049 is a `hidden beast` number, since 1 + 31 + 0 + 551 + 70 + 4 + 9 = 666.

13105517049 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 2 ways, for example, as 3437711424 + 9667805625 = 58632^2 + 98325^2 .

It is not a de Polignac number, because 13105517049 - 2⁸ = 13105516793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13105517449) 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 11 ways as a sum of consecutive naturals, for example, 25106094 + ... + 25106615.

It is an arithmetic number, because the mean of its divisors is an integer number (1631913075).

Almost surely, 2^13105517049 is an apocalyptic number.

It is an amenable number.

13105517049 is a deficient number, since it is larger than the sum of its proper divisors (6477439851).

13105517049 is a wasteful number, since it uses less digits than its factorization.

13105517049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50212744 (or 50212741 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The spelling of 13105517049 in words is "thirteen billion, one hundred five million, five hundred seventeen thousand, forty-nine".