138019922597 has 4 divisors (see below), whose sum is σ = 138030004140. Its totient is φ = 138009841056.

The previous prime is 138019922591. The next prime is 138019922617. The reversal of 138019922597 is 795229910831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77746726561 + 60273196036 = 278831^2 + 245506^2 .

It is a cyclic number.

It is not a de Polignac number, because 138019922597 - 2¹⁰ = 138019921573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138019922591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5020208 + ... + 5047625.

It is an arithmetic number, because the mean of its divisors is an integer number (34507501035).

Almost surely, 2^138019922597 is an apocalyptic number.

It is an amenable number.

138019922597 is a deficient number, since it is larger than the sum of its proper divisors (10081543).

138019922597 is a wasteful number, since it uses less digits than its factorization.

138019922597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10081542.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 138019922597 in words is "one hundred thirty-eight billion, nineteen million, nine hundred twenty-two thousand, five hundred ninety-seven".