138872116185 has 64 divisors (see below), whose sum is σ = 259103287296. Its totient is φ = 62833548800.

The previous prime is 138872116181. The next prime is 138872116237. The reversal of 138872116185 is 581611278831.

It is a happy number.

It is not a de Polignac number, because 138872116185 - 2² = 138872116181 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138872116181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 290667 + ... + 601856.

It is an arithmetic number, because the mean of its divisors is an integer number (4048488864).

Almost surely, 2^138872116185 is an apocalyptic number.

138872116185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138872116185 is a deficient number, since it is larger than the sum of its proper divisors (120231171111).

138872116185 is a wasteful number, since it uses less digits than its factorization.

138872116185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892606.

The product of its digits is 645120, while the sum is 51.

The spelling of 138872116185 in words is "one hundred thirty-eight billion, eight hundred seventy-two million, one hundred sixteen thousand, one hundred eighty-five".