138873688503 has 16 divisors (see below), whose sum is σ = 202004928000. Its totient is φ = 84163023680.

The previous prime is 138873688477. The next prime is 138873688537. The reversal of 138873688503 is 305886378831.

It is a cyclic number.

It is not a de Polignac number, because 138873688503 - 2⁶ = 138873688439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138873688543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1330738 + ... + 1431296.

It is an arithmetic number, because the mean of its divisors is an integer number (12625308000).

Almost surely, 2^138873688503 is an apocalyptic number.

138873688503 is a deficient number, since it is larger than the sum of its proper divisors (63131239497).

138873688503 is a wasteful number, since it uses less digits than its factorization.

138873688503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142422.

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 138873688503 in words is "one hundred thirty-eight billion, eight hundred seventy-three million, six hundred eighty-eight thousand, five hundred three".