13260392738 has 16 divisors (see below), whose sum is σ = 20589311160. Its totient is φ = 6397574400.

The previous prime is 13260392713. The next prime is 13260392801. The reversal of 13260392738 is 83729306231.

13260392738 is digitally balanced in base 5, 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 4 ways, for example, as 8898714889 + 4361677849 = 94333^2 + 66043^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23498 + ... + 164538.

Almost surely, 2^13260392738 is an apocalyptic number.

13260392738 is a deficient number, since it is larger than the sum of its proper divisors (7328918422).

13260392738 is a wasteful number, since it uses less digits than its factorization.

13260392738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142693.

The product of its (nonzero) digits is 326592, while the sum is 44.

Adding to 13260392738 its reverse (83729306231), we get a palindrome (96989698969).

The spelling of 13260392738 in words is "thirteen billion, two hundred sixty million, three hundred ninety-two thousand, seven hundred thirty-eight".