13938578386 has 16 divisors (see below), whose sum is σ = 21633638040. Its totient is φ = 6727472640.

The previous prime is 13938578371. The next prime is 13938578399. The reversal of 13938578386 is 68387583931.

It can be written as a sum of positive squares in 4 ways, for example, as 13567823361 + 370755025 = 116481^2 + 19255^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263266 + ... + 311746.

Almost surely, 2^13938578386 is an apocalyptic number.

13938578386 is a deficient number, since it is larger than the sum of its proper divisors (7695059654).

13938578386 is a wasteful number, since it uses less digits than its factorization.

13938578386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53469.

The product of its digits is 26127360, while the sum is 61.

The spelling of 13938578386 in words is "thirteen billion, nine hundred thirty-eight million, five hundred seventy-eight thousand, three hundred eighty-six".