13188536856438 has 32 divisors (see below), whose sum is σ = 26902094512896. Its totient is φ = 4308844252128.

The previous prime is 13188536856389. The next prime is 13188536856461. The reversal of 13188536856438 is 83465863588131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20782720 + ... + 21407907.

It is an arithmetic number, because the mean of its divisors is an integer number (840690453528).

Almost surely, 2^{13188536856438} is an apocalyptic number.

13188536856438 is an abundant number, since it is smaller than the sum of its proper divisors (13713557656458).

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

13188536856438 is a wasteful number, since it uses less digits than its factorization.

13188536856438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42191668.

The product of its digits is 398131200, while the sum is 69.

The spelling of 13188536856438 in words is "thirteen trillion, one hundred eighty-eight billion, five hundred thirty-six million, eight hundred fifty-six thousand, four hundred thirty-eight".