138888887503 has 16 divisors (see below), whose sum is σ = 149190702336. Its totient is φ = 128835987840.

The previous prime is 138888887471. The next prime is 138888887513. The reversal of 138888887503 is 305788888831.

138888887503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138888887503 - 2⁵ = 138888887471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138888887513) 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 15 ways as a sum of consecutive naturals, for example, 181500 + ... + 557422.

It is an arithmetic number, because the mean of its divisors is an integer number (9324418896).

Almost surely, 2^138888887503 is an apocalyptic number.

138888887503 is a deficient number, since it is larger than the sum of its proper divisors (10301814833).

138888887503 is a wasteful number, since it uses less digits than its factorization.

138888887503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376254.

The product of its (nonzero) digits is 82575360, while the sum is 67.

The spelling of 138888887503 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, eight hundred eighty-seven thousand, five hundred three".