13644665112 has 32 divisors (see below), whose sum is σ = 36735637680. Its totient is φ = 4198358400.

The previous prime is 13644665101. The next prime is 13644665113. The reversal of 13644665112 is 21156644631.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13644665113) 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 7 ways as a sum of consecutive naturals, for example, 21866139 + ... + 21866762.

Almost surely, 2^13644665112 is an apocalyptic number.

13644665112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13644665112 is an abundant number, since it is smaller than the sum of its proper divisors (23090972568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13644665112 is a wasteful number, since it uses less digits than its factorization.

13644665112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43732923 (or 43732919 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The spelling of 13644665112 in words is "thirteen billion, six hundred forty-four million, six hundred sixty-five thousand, one hundred twelve".