13647997440 has 960 divisors, whose sum is σ = 60515769600. Its totient is φ = 2817884160.

The previous prime is 13647997397. The next prime is 13647997459. The reversal of 13647997440 is 4479974631.

13647997440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (960).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 86929842 + ... + 86929998.

It is an arithmetic number, because the mean of its divisors is an integer number (63037260).

Almost surely, 2^13647997440 is an apocalyptic number.

13647997440 is a gapful number since it is divisible by the number (10) 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 13647997440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30257884800).

13647997440 is an abundant number, since it is smaller than the sum of its proper divisors (46867772160).

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

13647997440 is a wasteful number, since it uses less digits than its factorization.

13647997440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 13647997440 in words is "thirteen billion, six hundred forty-seven million, nine hundred ninety-seven thousand, four hundred forty".