13865663889 has 64 divisors (see below), whose sum is σ = 26493696000. Its totient is φ = 6954534720.

The previous prime is 13865663887. The next prime is 13865663893. The reversal of 13865663889 is 98836656831.

13865663889 is a `hidden beast` number, since 1 + 38 + 6 + 566 + 38 + 8 + 9 = 666.

It is not a de Polignac number, because 13865663889 - 2¹ = 13865663887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (13865663887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54699 + ... + 175280.

It is an arithmetic number, because the mean of its divisors is an integer number (413964000).

Almost surely, 2^13865663889 is an apocalyptic number.

It is an amenable number.

13865663889 is a deficient number, since it is larger than the sum of its proper divisors (12628032111).

13865663889 is a wasteful number, since it uses less digits than its factorization.

13865663889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230035 (or 230029 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 13865663889 in words is "thirteen billion, eight hundred sixty-five million, six hundred sixty-three thousand, eight hundred eighty-nine".