13643880729 has 12 divisors (see below), whose sum is σ = 18425057616. Its totient is φ = 8980769928.

The previous prime is 13643880703. The next prime is 13643880749. The reversal of 13643880729 is 92708834631.

13643880729 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 13643880729 - 2⁵ = 13643880697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13643880749) 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 11 ways as a sum of consecutive naturals, for example, 345639 + ... + 383084.

It is an arithmetic number, because the mean of its divisors is an integer number (1535421468).

Almost surely, 2^13643880729 is an apocalyptic number.

It is an amenable number.

13643880729 is a deficient number, since it is larger than the sum of its proper divisors (4781176887).

13643880729 is an frugal number, since it uses more digits than its factorization.

13643880729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728884 (or 728805 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 13643880729 in words is "thirteen billion, six hundred forty-three million, eight hundred eighty thousand, seven hundred twenty-nine".