13888632369 has 32 divisors (see below), whose sum is σ = 20329308160. Its totient is φ = 8401190400.

The previous prime is 13888632343. The next prime is 13888632389. The reversal of 13888632369 is 96323688831.

It is not a de Polignac number, because 13888632369 - 2⁵ = 13888632337 is a prime.

It is a super-2 number, since 2×13888632369² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13888632389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130884 + ... + 211914.

It is an arithmetic number, because the mean of its divisors is an integer number (635290880).

Almost surely, 2^13888632369 is an apocalyptic number.

13888632369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13888632369 is a deficient number, since it is larger than the sum of its proper divisors (6440675791).

13888632369 is a wasteful number, since it uses less digits than its factorization.

13888632369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81181.

The product of its digits is 8957952, while the sum is 57.

The spelling of 13888632369 in words is "thirteen billion, eight hundred eighty-eight million, six hundred thirty-two thousand, three hundred sixty-nine".