138242079318 has 32 divisors (see below), whose sum is σ = 324521950464. Its totient is φ = 38430230112.

The previous prime is 138242079317. The next prime is 138242079319. The reversal of 138242079318 is 813970242831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138242079317) and next prime (138242079319).

It is a super-2 number, since 2×138242079318² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138242079317) 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, 44477880 + ... + 44480987.

It is an arithmetic number, because the mean of its divisors is an integer number (10141310952).

Almost surely, 2^138242079318 is an apocalyptic number.

138242079318 is an abundant number, since it is smaller than the sum of its proper divisors (186279871146).

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

138242079318 is a wasteful number, since it uses less digits than its factorization.

138242079318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88958916.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 138242079318 in words is "one hundred thirty-eight billion, two hundred forty-two million, seventy-nine thousand, three hundred eighteen".