138184642235 has 4 divisors (see below), whose sum is σ = 165821570688. Its totient is φ = 110547713784.

The previous prime is 138184642201. The next prime is 138184642241. The reversal of 138184642235 is 532246481831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 532246481831 = 24329 ⋅21877039.

It is a cyclic number.

It is not a de Polignac number, because 138184642235 - 2⁸ = 138184641979 is a prime.

It is a super-2 number, since 2×138184642235² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138184642235.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13818464219 + ... + 13818464228.

It is an arithmetic number, because the mean of its divisors is an integer number (41455392672).

Almost surely, 2^138184642235 is an apocalyptic number.

138184642235 is a deficient number, since it is larger than the sum of its proper divisors (27636928453).

138184642235 is an equidigital number, since it uses as much as digits as its factorization.

138184642235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27636928452.

The product of its digits is 1105920, while the sum is 47.

The spelling of 138184642235 in words is "one hundred thirty-eight billion, one hundred eighty-four million, six hundred forty-two thousand, two hundred thirty-five".