138029866236 has 96 divisors (see below), whose sum is σ = 373563187200. Its totient is φ = 43991956800.

The previous prime is 138029866207. The next prime is 138029866237. The reversal of 138029866236 is 632668920831.

138029866236 is a `hidden beast` number, since 1 + 3 + 8 + 0 + 2 + 9 + 8 + 6 + 623 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138029866237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7141786 + ... + 7161086.

It is an arithmetic number, because the mean of its divisors is an integer number (3891283200).

Almost surely, 2^138029866236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138029866236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186781593600).

138029866236 is an abundant number, since it is smaller than the sum of its proper divisors (235533320964).

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

138029866236 is a wasteful number, since it uses less digits than its factorization.

138029866236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22216 (or 22208 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 138029866236 in words is "one hundred thirty-eight billion, twenty-nine million, eight hundred sixty-six thousand, two hundred thirty-six".