13564685889 has 12 divisors (see below), whose sum is σ = 19813587300. Its totient is φ = 8941515264.

The previous prime is 13564685867. The next prime is 13564685891. The reversal of 13564685889 is 98858646531.

13564685889 is a `hidden beast` number, since 1 + 3 + 5 + 6 + 46 + 8 + 588 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7261596225 + 6303089664 = 85215^2 + 79392^2 .

It is not a de Polignac number, because 13564685889 - 2⁸ = 13564685633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13564685809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8466544 + ... + 8468145.

It is an arithmetic number, because the mean of its divisors is an integer number (1651132275).

Almost surely, 2^13564685889 is an apocalyptic number.

It is an amenable number.

13564685889 is a deficient number, since it is larger than the sum of its proper divisors (6248901411).

13564685889 is a wasteful number, since it uses less digits than its factorization.

13564685889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16934784 (or 16934781 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 13564685889 in words is "thirteen billion, five hundred sixty-four million, six hundred eighty-five thousand, eight hundred eighty-nine".