138173643043 has 4 divisors (see below), whose sum is σ = 138174708328. Its totient is φ = 138172577760.

The previous prime is 138173643037. The next prime is 138173643067. The reversal of 138173643043 is 340346371831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 138173643043 - 2⁵ = 138173643011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138173643073) 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 3 ways as a sum of consecutive naturals, for example, 305913 + ... + 608218.

It is an arithmetic number, because the mean of its divisors is an integer number (34543677082).

Almost surely, 2^138173643043 is an apocalyptic number.

138173643043 is a deficient number, since it is larger than the sum of its proper divisors (1065285).

138173643043 is an equidigital number, since it uses as much as digits as its factorization.

138173643043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065284.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 138173643043 in words is "one hundred thirty-eight billion, one hundred seventy-three million, six hundred forty-three thousand, forty-three".