444881388918 has 8 divisors (see below), whose sum is σ = 889762777848. Its totient is φ = 148293796304.

The previous prime is 444881388907. The next prime is 444881388929. The reversal of 444881388918 is 819883188444.

It is an interprime number because it is at equal distance from previous prime (444881388907) and next prime (444881388929).

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

444881388918 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37073449071 + ... + 37073449082.

It is an arithmetic number, because the mean of its divisors is an integer number (111220347231).

Almost surely, 2^444881388918 is an apocalyptic number.

444881388918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

444881388918 is a wasteful number, since it uses less digits than its factorization.

444881388918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74146898158.

The product of its digits is 56623104, while the sum is 66.

The spelling of 444881388918 in words is "four hundred forty-four billion, eight hundred eighty-one million, three hundred eighty-eight thousand, nine hundred eighteen".