138717858171 has 16 divisors (see below), whose sum is σ = 185730414624. Its totient is φ = 92092145664.

The previous prime is 138717858133. The next prime is 138717858173. The reversal of 138717858171 is 171858717831.

It is not a de Polignac number, because 138717858171 - 2¹³ = 138717849979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138717858173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2854045 + ... + 2902241.

It is an arithmetic number, because the mean of its divisors is an integer number (11608150914).

Almost surely, 2^138717858171 is an apocalyptic number.

138717858171 is a deficient number, since it is larger than the sum of its proper divisors (47012556453).

138717858171 is a wasteful number, since it uses less digits than its factorization.

138717858171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52190.

The product of its digits is 2634240, while the sum is 57.

The spelling of 138717858171 in words is "one hundred thirty-eight billion, seven hundred seventeen million, eight hundred fifty-eight thousand, one hundred seventy-one".