138536799639 has 8 divisors (see below), whose sum is σ = 211103694720. Its totient is φ = 79163885496.

The previous prime is 138536799637. The next prime is 138536799647. The reversal of 138536799639 is 936997635831.

138536799639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138536799639 - 2¹ = 138536799637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138536799637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3298495209 + ... + 3298495250.

It is an arithmetic number, because the mean of its divisors is an integer number (26387961840).

Almost surely, 2^138536799639 is an apocalyptic number.

138536799639 is a deficient number, since it is larger than the sum of its proper divisors (72566895081).

138536799639 is an equidigital number, since it uses as much as digits as its factorization.

138536799639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6596990469.

The product of its digits is 198404640, while the sum is 69.

The spelling of 138536799639 in words is "one hundred thirty-eight billion, five hundred thirty-six million, seven hundred ninety-nine thousand, six hundred thirty-nine".