138618218214 has 32 divisors (see below), whose sum is σ = 352046269440. Its totient is φ = 39605205096.

The previous prime is 138618218213. The next prime is 138618218231. The reversal of 138618218214 is 412812816831.

138618218214 is a `hidden beast` number, since 1 + 3 + 8 + 618 + 2 + 1 + 8 + 21 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 138618218214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138618218213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183357054 + ... + 183357809.

It is an arithmetic number, because the mean of its divisors is an integer number (11001445920).

Almost surely, 2^138618218214 is an apocalyptic number.

138618218214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138618218214 is an abundant number, since it is smaller than the sum of its proper divisors (213428051226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138618218214 is a wasteful number, since it uses less digits than its factorization.

138618218214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366714881 (or 366714875 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The spelling of 138618218214 in words is "one hundred thirty-eight billion, six hundred eighteen million, two hundred eighteen thousand, two hundred fourteen".