138623735443 has 32 divisors (see below), whose sum is σ = 151302767616. Its totient is φ = 126496194048.

The previous prime is 138623735407. The next prime is 138623735449. The reversal of 138623735443 is 344537326831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138623735443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138623735449) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 60612646 + ... + 60614932.

It is an arithmetic number, because the mean of its divisors is an integer number (4728211488).

Almost surely, 2^138623735443 is an apocalyptic number.

138623735443 is a deficient number, since it is larger than the sum of its proper divisors (12679032173).

138623735443 is a wasteful number, since it uses less digits than its factorization.

138623735443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923.

The product of its digits is 4354560, while the sum is 49.

The spelling of 138623735443 in words is "one hundred thirty-eight billion, six hundred twenty-three million, seven hundred thirty-five thousand, four hundred forty-three".