138511734185 has 16 divisors (see below), whose sum is σ = 181390802112. Its totient is φ = 100698945600.

The previous prime is 138511734133. The next prime is 138511734197. The reversal of 138511734185 is 581437115831.

It is not a de Polignac number, because 138511734185 - 2⁶ = 138511734121 is a prime.

It is a super-2 number, since 2×138511734185² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308639 + ... + 610148.

It is an arithmetic number, because the mean of its divisors is an integer number (11336925132).

Almost surely, 2^138511734185 is an apocalyptic number.

It is an amenable number.

138511734185 is a deficient number, since it is larger than the sum of its proper divisors (42879067927).

138511734185 is a wasteful number, since it uses less digits than its factorization.

138511734185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921544.

The product of its digits is 403200, while the sum is 47.

The spelling of 138511734185 in words is "one hundred thirty-eight billion, five hundred eleven million, seven hundred thirty-four thousand, one hundred eighty-five".