138440943529 has 8 divisors (see below), whose sum is σ = 159356482880. Its totient is φ = 117809969616.

The previous prime is 138440943523. The next prime is 138440943541. The reversal of 138440943529 is 925349044831.

138440943529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138440943529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138440943523) 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 7 ways as a sum of consecutive naturals, for example, 71140314 + ... + 71142259.

It is an arithmetic number, because the mean of its divisors is an integer number (19919560360).

Almost surely, 2^138440943529 is an apocalyptic number.

It is an amenable number.

138440943529 is a deficient number, since it is larger than the sum of its proper divisors (20915539351).

138440943529 is a wasteful number, since it uses less digits than its factorization.

138440943529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142282719.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 138440943529 in words is "one hundred thirty-eight billion, four hundred forty million, nine hundred forty-three thousand, five hundred twenty-nine".