138939372980 has 12 divisors (see below), whose sum is σ = 291772683300. Its totient is φ = 55575749184.

The previous prime is 138939372977. The next prime is 138939373009. The reversal of 138939372980 is 89273939831.

It can be written as a sum of positive squares in 2 ways, for example, as 63571553956 + 75367819024 = 252134^2 + 274532^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3473484305 + ... + 3473484344.

It is an arithmetic number, because the mean of its divisors is an integer number (24314390275).

Almost surely, 2^138939372980 is an apocalyptic number.

138939372980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138939372980 is an abundant number, since it is smaller than the sum of its proper divisors (152833310320).

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

138939372980 is a wasteful number, since it uses less digits than its factorization.

138939372980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6946968658 (or 6946968656 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 138939372980 in words is "one hundred thirty-eight billion, nine hundred thirty-nine million, three hundred seventy-two thousand, nine hundred eighty".