13638618826 has 32 divisors (see below), whose sum is σ = 24696004608. Its totient is φ = 5525014320.

The previous prime is 13638618811. The next prime is 13638618839. The reversal of 13638618826 is 62881683631.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346750 + ... + 384073.

It is an arithmetic number, because the mean of its divisors is an integer number (771750144).

Almost surely, 2^13638618826 is an apocalyptic number.

13638618826 is a deficient number, since it is larger than the sum of its proper divisors (11057385782).

13638618826 is a wasteful number, since it uses less digits than its factorization.

13638618826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730906.

The product of its digits is 1990656, while the sum is 52.

The spelling of 13638618826 in words is "thirteen billion, six hundred thirty-eight million, six hundred eighteen thousand, eight hundred twenty-six".