13728396645 has 16 divisors (see below), whose sum is σ = 24406038720. Its totient is φ = 7321811472.

The previous prime is 13728396641. The next prime is 13728396659. The reversal of 13728396645 is 54669382731.

13728396645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13728396645 - 2² = 13728396641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13728396591 and 13728396600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13728396641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 50845779 + ... + 50846048.

It is an arithmetic number, because the mean of its divisors is an integer number (1525377420).

Almost surely, 2^13728396645 is an apocalyptic number.

13728396645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13728396645 is a deficient number, since it is larger than the sum of its proper divisors (10677642075).

13728396645 is a wasteful number, since it uses less digits than its factorization.

13728396645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101691841 (or 101691835 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 13728396645 in words is "thirteen billion, seven hundred twenty-eight million, three hundred ninety-six thousand, six hundred forty-five".