138913646185 has 8 divisors (see below), whose sum is σ = 166804000200. Its totient is φ = 111059167104.

The previous prime is 138913646159. The next prime is 138913646213. The reversal of 138913646185 is 581646319831.

It can be written as a sum of positive squares in 4 ways, for example, as 1634504041 + 137279142144 = 40429^2 + 370512^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138913646185 - 2²³ = 138905257577 is a prime.

It is a super-2 number, since 2×138913646185² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8960212 + ... + 8975701.

It is an arithmetic number, because the mean of its divisors is an integer number (20850500025).

Almost surely, 2^138913646185 is an apocalyptic number.

It is an amenable number.

138913646185 is a deficient number, since it is larger than the sum of its proper divisors (27890354015).

138913646185 is a wasteful number, since it uses less digits than its factorization.

138913646185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17937467.

The product of its digits is 3732480, while the sum is 55.

The spelling of 138913646185 in words is "one hundred thirty-eight billion, nine hundred thirteen million, six hundred forty-six thousand, one hundred eighty-five".