138875027538 has 64 divisors (see below), whose sum is σ = 309293494272. Its totient is φ = 41281496640.

The previous prime is 138875027527. The next prime is 138875027561. The reversal of 138875027538 is 835720578831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1370445 + ... + 1468287.

It is an arithmetic number, because the mean of its divisors is an integer number (4832710848).

Almost surely, 2^138875027538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138875027538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154646747136).

138875027538 is an abundant number, since it is smaller than the sum of its proper divisors (170418466734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138875027538 is a wasteful number, since it uses less digits than its factorization.

138875027538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98479.

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 138875027538 in words is "one hundred thirty-eight billion, eight hundred seventy-five million, twenty-seven thousand, five hundred thirty-eight".