438544136039 has 4 divisors (see below), whose sum is σ = 439786471056. Its totient is φ = 437301801024.

The previous prime is 438544136021. The next prime is 438544136047. The reversal of 438544136039 is 930631445834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438544136039 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 (438544136059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621166979 + ... + 621167684.

It is an arithmetic number, because the mean of its divisors is an integer number (109946617764).

Almost surely, 2^438544136039 is an apocalyptic number.

438544136039 is a deficient number, since it is larger than the sum of its proper divisors (1242335017).

438544136039 is a wasteful number, since it uses less digits than its factorization.

438544136039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242335016.

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 438544136039 in words is "four hundred thirty-eight billion, five hundred forty-four million, one hundred thirty-six thousand, thirty-nine".