138115934244 has 24 divisors (see below), whose sum is σ = 358078348320. Its totient is φ = 46038644712.

The previous prime is 138115934221. The next prime is 138115934249. The reversal of 138115934244 is 442439511831.

138115934244 is a `hidden beast` number, since 1 + 3 + 8 + 11 + 593 + 4 + 2 + 44 = 666.

It is a super-2 number, since 2×138115934244² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138115934244.

It is not an unprimeable number, because it can be changed into a prime (138115934249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639425514 + ... + 639425729.

It is an arithmetic number, because the mean of its divisors is an integer number (14919931180).

Almost surely, 2^138115934244 is an apocalyptic number.

It is an amenable number.

138115934244 is an abundant number, since it is smaller than the sum of its proper divisors (219962414076).

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

138115934244 is a wasteful number, since it uses less digits than its factorization.

138115934244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278851256 (or 1278851248 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

It can be divided in two parts, 1381159 and 34244, that added together give a triangular number (1415403 = T₁₆₈₂).

The spelling of 138115934244 in words is "one hundred thirty-eight billion, one hundred fifteen million, nine hundred thirty-four thousand, two hundred forty-four".