138878502503 has 12 divisors (see below), whose sum is σ = 156921636240. Its totient is φ = 122621818176.

The previous prime is 138878502487. The next prime is 138878502527. The reversal of 138878502503 is 305205878831.

138878502503 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 138878502503 - 2⁴ = 138878502487 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 (138878582503) 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 11 ways as a sum of consecutive naturals, for example, 17860598 + ... + 17868371.

It is an arithmetic number, because the mean of its divisors is an integer number (13076803020).

Almost surely, 2^138878502503 is an apocalyptic number.

138878502503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138878502503 is a deficient number, since it is larger than the sum of its proper divisors (18043133737).

138878502503 is a wasteful number, since it uses less digits than its factorization.

138878502503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35729018 (or 35729005 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 138878502503 in words is "one hundred thirty-eight billion, eight hundred seventy-eight million, five hundred two thousand, five hundred three".