138218899168 has 24 divisors (see below), whose sum is σ = 310992523632. Its totient is φ = 59236670976.

The previous prime is 138218899153. The next prime is 138218899207. The reversal of 138218899168 is 861998812831.

138218899168 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308524105 + ... + 308524552.

It is an arithmetic number, because the mean of its divisors is an integer number (12958021818).

Almost surely, 2^138218899168 is an apocalyptic number.

It is an amenable number.

138218899168 is an abundant number, since it is smaller than the sum of its proper divisors (172773624464).

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

138218899168 is an equidigital number, since it uses as much as digits as its factorization.

138218899168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617048674 (or 617048666 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 64.

The spelling of 138218899168 in words is "one hundred thirty-eight billion, two hundred eighteen million, eight hundred ninety-nine thousand, one hundred sixty-eight".