138338390752 has 48 divisors (see below), whose sum is σ = 278547377472. Its totient is φ = 67600422400.

The previous prime is 138338390747. The next prime is 138338390843. The reversal of 138338390752 is 257093833831.

It is a self number, because there is not a number n which added to its sum of digits gives 138338390752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988698 + ... + 1119910.

It is an arithmetic number, because the mean of its divisors is an integer number (5803070364).

Almost surely, 2^138338390752 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 138338390752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139273688736).

138338390752 is an abundant number, since it is smaller than the sum of its proper divisors (140208986720).

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

138338390752 is a wasteful number, since it uses less digits than its factorization.

138338390752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131971 (or 131963 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 138338390752 in words is "one hundred thirty-eight billion, three hundred thirty-eight million, three hundred ninety thousand, seven hundred fifty-two".