138340720107 has 24 divisors (see below), whose sum is σ = 204698546624. Its totient is φ = 89982782064.

The previous prime is 138340720099. The next prime is 138340720109. The reversal of 138340720107 is 701027043831.

It is not a de Polignac number, because 138340720107 - 2³ = 138340720099 is a prime.

It is a super-3 number, since 3×138340720107³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138340720109) 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, 153948 + ... + 548070.

Almost surely, 2^138340720107 is an apocalyptic number.

138340720107 is a deficient number, since it is larger than the sum of its proper divisors (66357826517).

138340720107 is a wasteful number, since it uses less digits than its factorization.

138340720107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395079 (or 395076 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

Adding to 138340720107 its reverse (701027043831), we get a palindrome (839367763938).

The spelling of 138340720107 in words is "one hundred thirty-eight billion, three hundred forty million, seven hundred twenty thousand, one hundred seven".