138701670181 has 2 divisors, whose sum is σ = 138701670182. Its totient is φ = 138701670180.

The previous prime is 138701670179. The next prime is 138701670227. The reversal of 138701670181 is 181076107831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114687209025 + 24014461156 = 338655^2 + 154966^2 .

It is a cyclic number.

It is not a de Polignac number, because 138701670181 - 2¹ = 138701670179 is a prime.

It is a super-2 number, since 2×138701670181² (a number of 23 digits) contains 22 as substring.

Together with 138701670179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138701670281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69350835090 + 69350835091.

It is an arithmetic number, because the mean of its divisors is an integer number (69350835091).

Almost surely, 2^138701670181 is an apocalyptic number.

It is an amenable number.

138701670181 is a deficient number, since it is larger than the sum of its proper divisors (1).

138701670181 is an equidigital number, since it uses as much as digits as its factorization.

138701670181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 43.

The spelling of 138701670181 in words is "one hundred thirty-eight billion, seven hundred one million, six hundred seventy thousand, one hundred eighty-one".