138573845217 has 6 divisors (see below), whose sum is σ = 200162220882. Its totient is φ = 92382563472.

The previous prime is 138573845213. The next prime is 138573845227. The reversal of 138573845217 is 712548375831.

138573845217 is a `hidden beast` number, since 1 + 3 + 8 + 573 + 8 + 4 + 52 + 17 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74966987601 + 63606857616 = 273801^2 + 252204^2 .

It is not a de Polignac number, because 138573845217 - 2² = 138573845213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138573845213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7698546948 + ... + 7698546965.

It is an arithmetic number, because the mean of its divisors is an integer number (33360370147).

Almost surely, 2^138573845217 is an apocalyptic number.

It is an amenable number.

138573845217 is a deficient number, since it is larger than the sum of its proper divisors (61588375665).

138573845217 is a wasteful number, since it uses less digits than its factorization.

138573845217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15397093919 (or 15397093916 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 138573845217 in words is "one hundred thirty-eight billion, five hundred seventy-three million, eight hundred forty-five thousand, two hundred seventeen".