438031550639 has 4 divisors (see below), whose sum is σ = 440654494224. Its totient is φ = 435408607056.

The previous prime is 438031550633. The next prime is 438031550657. The reversal of 438031550639 is 936055130834.

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

It is not a de Polignac number, because 438031550639 - 2¹⁶ = 438031485103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438031550593 and 438031550602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438031550633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311471542 + ... + 1311471875.

It is an arithmetic number, because the mean of its divisors is an integer number (110163623556).

Almost surely, 2^438031550639 is an apocalyptic number.

438031550639 is a deficient number, since it is larger than the sum of its proper divisors (2622943585).

438031550639 is a wasteful number, since it uses less digits than its factorization.

438031550639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622943584.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 438031550639 in words is "four hundred thirty-eight billion, thirty-one million, five hundred fifty thousand, six hundred thirty-nine".