138170752132 has 72 divisors (see below), whose sum is σ = 285375333600. Its totient is φ = 58359321216.

The previous prime is 138170752081. The next prime is 138170752133. The reversal of 138170752132 is 231257071831.

It is not an unprimeable number, because it can be changed into a prime (138170752133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3713919 + ... + 3750937.

It is an arithmetic number, because the mean of its divisors is an integer number (3963546300).

Almost surely, 2^138170752132 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 138170752132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142687666800).

138170752132 is an abundant number, since it is smaller than the sum of its proper divisors (147204581468).

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

138170752132 is a wasteful number, since it uses less digits than its factorization.

138170752132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37313 (or 37304 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 138170752132 in words is "one hundred thirty-eight billion, one hundred seventy million, seven hundred fifty-two thousand, one hundred thirty-two".