138189625820 has 12 divisors (see below), whose sum is σ = 290198214264. Its totient is φ = 55275850320.

The previous prime is 138189625813. The next prime is 138189625841. The reversal of 138189625820 is 28526981831.

138189625820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138189625820² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3454740626 + ... + 3454740665.

It is an arithmetic number, because the mean of its divisors is an integer number (24183184522).

Almost surely, 2^138189625820 is an apocalyptic number.

138189625820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138189625820 is an abundant number, since it is smaller than the sum of its proper divisors (152008588444).

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

138189625820 is a wasteful number, since it uses less digits than its factorization.

138189625820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6909481300 (or 6909481298 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 138189625820 in words is "one hundred thirty-eight billion, one hundred eighty-nine million, six hundred twenty-five thousand, eight hundred twenty".