138981473792 has 120 divisors (see below), whose sum is σ = 323382076776. Its totient is φ = 59498385408.

The previous prime is 138981473783. The next prime is 138981473831. The reversal of 138981473792 is 297374189831.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 28171358 + ... + 28176290.

Almost surely, 2^138981473792 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 138981473792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161691038388).

138981473792 is an abundant number, since it is smaller than the sum of its proper divisors (184400602984).

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

138981473792 is an equidigital number, since it uses as much as digits as its factorization.

138981473792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088 (or 6065 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 62.

The spelling of 138981473792 in words is "one hundred thirty-eight billion, nine hundred eighty-one million, four hundred seventy-three thousand, seven hundred ninety-two".