138372952171 has 8 divisors (see below), whose sum is σ = 139283116544. Its totient is φ = 137463535080.

The previous prime is 138372952147. The next prime is 138372952177. The reversal of 138372952171 is 171259273831.

138372952171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138372952171 - 2⁵ = 138372952139 is a prime.

It is a super-2 number, since 2×138372952171² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138372952177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187186 + ... + 558376.

It is an arithmetic number, because the mean of its divisors is an integer number (17410389568).

Almost surely, 2^138372952171 is an apocalyptic number.

138372952171 is a deficient number, since it is larger than the sum of its proper divisors (910164373).

138372952171 is a wasteful number, since it uses less digits than its factorization.

138372952171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373641.

The product of its digits is 635040, while the sum is 49.

The spelling of 138372952171 in words is "one hundred thirty-eight billion, three hundred seventy-two million, nine hundred fifty-two thousand, one hundred seventy-one".