138915166208 has 216 divisors, whose sum is σ = 349920829440. Its totient is φ = 54948741120.

The previous prime is 138915166193. The next prime is 138915166213. The reversal of 138915166208 is 802661519831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16955393 + ... + 16963583.

It is an arithmetic number, because the mean of its divisors is an integer number (1620003840).

Almost surely, 2^138915166208 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 138915166208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174960414720).

138915166208 is an abundant number, since it is smaller than the sum of its proper divisors (211005663232).

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

138915166208 is an equidigital number, since it uses as much as digits as its factorization.

138915166208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253 (or 8213 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 138915166208 in words is "one hundred thirty-eight billion, nine hundred fifteen million, one hundred sixty-six thousand, two hundred eight".