13320749638686 has 128 divisors (see below), whose sum is σ = 32663554560000. Its totient is φ = 3534864113664.

The previous prime is 13320749638643. The next prime is 13320749638697. The reversal of 13320749638686 is 68683694702331.

13320749638686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109874710 + ... + 109995878.

It is an arithmetic number, because the mean of its divisors is an integer number (255184020000).

Almost surely, 2^{13320749638686} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13320749638686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16331777280000).

13320749638686 is an abundant number, since it is smaller than the sum of its proper divisors (19342804921314).

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

13320749638686 is a wasteful number, since it uses less digits than its factorization.

13320749638686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123226.

The product of its (nonzero) digits is 188116992, while the sum is 66.

The spelling of 13320749638686 in words is "thirteen trillion, three hundred twenty billion, seven hundred forty-nine million, six hundred thirty-eight thousand, six hundred eighty-six".