138888888888888 has 48 divisors (see below), whose sum is σ = 376159875000000. Its totient is φ = 46295992592640.

The previous prime is 138888888888887. The next prime is 138888888888889. The reversal of 138888888888888 is 888888888888831.

138888888888888 is a `hidden beast` number, since 138 + 88 + 88 + 88 + 88 + 88 + 88 = 666.

It is an interprime number because it is at equal distance from previous prime (138888888888887) and next prime (138888888888889).

It is a nude number because it is divisible by every one of its digits.

138888888888888 is a modest number, since divided by 88888888 gives 1388888 as remainder.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 138888888888888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138888888888887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4861113 + ... + 17361111.

It is an arithmetic number, because the mean of its divisors is an integer number (7836664062500).

Almost surely, 2^{138888888888888} is an apocalyptic number.

138888888888888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138888888888888 is an abundant number, since it is smaller than the sum of its proper divisors (237270986111112).

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

138888888888888 is a wasteful number, since it uses less digits than its factorization.

138888888888888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12654332 (or 12654325 counting only the distinct ones).

The product of its digits is 1649267441664, while the sum is 108.

The spelling of 138888888888888 in words is "one hundred thirty-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-eight".