138607992513918 has 48 divisors (see below), whose sum is σ = 302099089056336. Its totient is φ = 45929226458880.

The previous prime is 138607992513869. The next prime is 138607992513929. The reversal of 138607992513918 is 819315299706831.

138607992513918 is a `hidden beast` number, since 1 + 3 + 8 + 6 + 0 + 7 + 9 + 92 + 513 + 9 + 18 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25934305 + ... + 30818892.

It is an arithmetic number, because the mean of its divisors is an integer number (6293731022007).

Almost surely, 2^{138607992513918} is an apocalyptic number.

138607992513918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138607992513918 is an abundant number, since it is smaller than the sum of its proper divisors (163491096542418).

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

138607992513918 is a wasteful number, since it uses less digits than its factorization.

138607992513918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56754009 (or 56754006 counting only the distinct ones).

The product of its (nonzero) digits is 176359680, while the sum is 72.

The spelling of 138607992513918 in words is "one hundred thirty-eight trillion, six hundred seven billion, nine hundred ninety-two million, five hundred thirteen thousand, nine hundred eighteen".