138365163 has 36 divisors (see below), whose sum is σ = 216822528. Its totient is φ = 84952800.

The previous prime is 138365137. The next prime is 138365173. The reversal of 138365163 is 361563831.

It is a happy number.

138365163 is a `hidden beast` number, since 138 + 3 + 6 + 516 + 3 = 666.

It is not a de Polignac number, because 138365163 - 2¹⁷ = 138234091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138365173) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 119638 + ... + 120788.

It is an arithmetic number, because the mean of its divisors is an integer number (6022848).

Almost surely, 2^138365163 is an apocalyptic number.

138365163 is a deficient number, since it is larger than the sum of its proper divisors (78457365).

138365163 is a wasteful number, since it uses less digits than its factorization.

138365163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1210 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 138365163 is about 11762.8722257789. The cubic root of 138365163 is about 517.2203291769.

The spelling of 138365163 in words is "one hundred thirty-eight million, three hundred sixty-five thousand, one hundred sixty-three".