138448230911 has 4 divisors (see below), whose sum is σ = 146592244512. Its totient is φ = 130304217312.

The previous prime is 138448230871. The next prime is 138448230929. The reversal of 138448230911 is 119032844831.

138448230911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119032844831 = 7853 ⋅15157627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138448230911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138448230211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4072006775 + ... + 4072006808.

It is an arithmetic number, because the mean of its divisors is an integer number (36648061128).

Almost surely, 2^138448230911 is an apocalyptic number.

138448230911 is a deficient number, since it is larger than the sum of its proper divisors (8144013601).

138448230911 is an equidigital number, since it uses as much as digits as its factorization.

138448230911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144013600.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 138448230911 in words is "one hundred thirty-eight billion, four hundred forty-eight million, two hundred thirty thousand, nine hundred eleven".