13663665432 has 96 divisors (see below), whose sum is σ = 37634388480. Its totient is φ = 4477556160.

The previous prime is 13663665413. The next prime is 13663665437. The reversal of 13663665432 is 23456636631.

13663665432 is a `hidden beast` number, since 1 + 3 + 6 + 636 + 6 + 5 + 4 + 3 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663665437) 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 23 ways as a sum of consecutive naturals, for example, 1872463 + ... + 1879745.

It is an arithmetic number, because the mean of its divisors is an integer number (392024880).

Almost surely, 2^13663665432 is an apocalyptic number.

13663665432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13663665432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18817194240).

13663665432 is an abundant number, since it is smaller than the sum of its proper divisors (23970723048).

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

13663665432 is a wasteful number, since it uses less digits than its factorization.

13663665432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733 (or 7726 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 45.

The spelling of 13663665432 in words is "thirteen billion, six hundred sixty-three million, six hundred sixty-five thousand, four hundred thirty-two".