438909665979 has 32 divisors (see below), whose sum is σ = 609880227840. Its totient is φ = 280601985312.

The previous prime is 438909665977. The next prime is 438909666017. The reversal of 438909665979 is 979566909834.

It is not a de Polignac number, because 438909665979 - 2¹ = 438909665977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438909665979.

It is not an unprimeable number, because it can be changed into a prime (438909665977) 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, 1041814 + ... + 1401140.

It is an arithmetic number, because the mean of its divisors is an integer number (19058757120).

Almost surely, 2^438909665979 is an apocalyptic number.

438909665979 is a deficient number, since it is larger than the sum of its proper divisors (170970561861).

438909665979 is a wasteful number, since it uses less digits than its factorization.

438909665979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359559.

The product of its (nonzero) digits is 793618560, while the sum is 75.

The spelling of 438909665979 in words is "four hundred thirty-eight billion, nine hundred nine million, six hundred sixty-five thousand, nine hundred seventy-nine".