13888806565 has 16 divisors (see below), whose sum is σ = 17452695168. Its totient is φ = 10590376896.

The previous prime is 13888806563. The next prime is 13888806571. The reversal of 13888806565 is 56560888831.

It is a cyclic number.

It is not a de Polignac number, because 13888806565 - 2¹ = 13888806563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888806563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180834 + ... + 245923.

It is an arithmetic number, because the mean of its divisors is an integer number (1090793448).

Almost surely, 2^13888806565 is an apocalyptic number.

It is an amenable number.

13888806565 is a deficient number, since it is larger than the sum of its proper divisors (3563888603).

13888806565 is a wasteful number, since it uses less digits than its factorization.

13888806565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427068.

The product of its (nonzero) digits is 11059200, while the sum is 58.

The spelling of 13888806565 in words is "thirteen billion, eight hundred eighty-eight million, eight hundred six thousand, five hundred sixty-five".