138425668389 has 20 divisors (see below), whose sum is σ = 211183689024. Its totient is φ = 90320291784.

The previous prime is 138425668387. The next prime is 138425668391. The reversal of 138425668389 is 983866524831.

It is a happy number.

138425668389 is a `hidden beast` number, since 1 + 38 + 4 + 2 + 566 + 8 + 38 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (138425668387) and next prime (138425668391).

It is not a de Polignac number, because 138425668389 - 2¹ = 138425668387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138425668387) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18176607 + ... + 18184220.

Almost surely, 2^138425668389 is an apocalyptic number.

It is an amenable number.

138425668389 is a deficient number, since it is larger than the sum of its proper divisors (72758020635).

138425668389 is an equidigital number, since it uses as much as digits as its factorization.

138425668389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36360886 (or 36360877 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 138425668389 in words is "one hundred thirty-eight billion, four hundred twenty-five million, six hundred sixty-eight thousand, three hundred eighty-nine".