138791381588 has 6 divisors (see below), whose sum is σ = 242884917786. Its totient is φ = 69395690792.

The previous prime is 138791381579. The next prime is 138791381669. The reversal of 138791381588 is 885183197831.

It can be written as a sum of positive squares in only one way, i.e., 134169829264 + 4621552324 = 366292^2 + 67982^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138791381588.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17348922695 + ... + 17348922702.

It is an arithmetic number, because the mean of its divisors is an integer number (40480819631).

Almost surely, 2^138791381588 is an apocalyptic number.

It is an amenable number.

138791381588 is a deficient number, since it is larger than the sum of its proper divisors (104093536198).

138791381588 is a wasteful number, since it uses less digits than its factorization.

138791381588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34697845401 (or 34697845399 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 62.

The spelling of 138791381588 in words is "one hundred thirty-eight billion, seven hundred ninety-one million, three hundred eighty-one thousand, five hundred eighty-eight".