138638383267 has 4 divisors (see below), whose sum is σ = 140707612936. Its totient is φ = 136569153600.

The previous prime is 138638383237. The next prime is 138638383271. The reversal of 138638383267 is 762383836831.

138638383267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138638383267 - 2¹⁹ = 138637858979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138638383207) 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 3 ways as a sum of consecutive naturals, for example, 1034614734 + ... + 1034614867.

It is an arithmetic number, because the mean of its divisors is an integer number (35176903234).

Almost surely, 2^138638383267 is an apocalyptic number.

138638383267 is a deficient number, since it is larger than the sum of its proper divisors (2069229669).

138638383267 is an equidigital number, since it uses as much as digits as its factorization.

138638383267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069229668.

The product of its digits is 20901888, while the sum is 58.

The spelling of 138638383267 in words is "one hundred thirty-eight billion, six hundred thirty-eight million, three hundred eighty-three thousand, two hundred sixty-seven".