138718275181 has 2 divisors, whose sum is σ = 138718275182. Its totient is φ = 138718275180.

The previous prime is 138718275173. The next prime is 138718275203. The reversal of 138718275181 is 181572817831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105306091081 + 33412184100 = 324509^2 + 182790^2 .

It is a cyclic number.

It is not a de Polignac number, because 138718275181 - 2³ = 138718275173 is a prime.

It is a super-2 number, since 2×138718275181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138718275151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69359137590 + 69359137591.

It is an arithmetic number, because the mean of its divisors is an integer number (69359137591).

Almost surely, 2^138718275181 is an apocalyptic number.

It is an amenable number.

138718275181 is a deficient number, since it is larger than the sum of its proper divisors (1).

138718275181 is an equidigital number, since it uses as much as digits as its factorization.

138718275181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 52.

The spelling of 138718275181 in words is "one hundred thirty-eight billion, seven hundred eighteen million, two hundred seventy-five thousand, one hundred eighty-one".