13378226738 has 30 divisors (see below), whose sum is σ = 21397141179. Its totient is φ = 6273390048.

The previous prime is 13378226737. The next prime is 13378226767. The reversal of 13378226738 is 83762287331.

13378226738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 12878391289 + 499835449 = 113483^2 + 22357^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=81787.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13378226737) 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 14 ways as a sum of consecutive naturals, for example, 47272745 + ... + 47273027.

Almost surely, 2^13378226738 is an apocalyptic number.

13378226738 is a deficient number, since it is larger than the sum of its proper divisors (8018914441).

13378226738 is an frugal number, since it uses more digits than its factorization.

13378226738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 302 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 50.

Multiplying 13378226738 by its sum of digits (50), we get a square (668911336900 = 817870²).

The spelling of 13378226738 in words is "thirteen billion, three hundred seventy-eight million, two hundred twenty-six thousand, seven hundred thirty-eight".