444418663840 has 48 divisors (see below), whose sum is σ = 1050154398720. Its totient is φ = 177731011840.

The previous prime is 444418663811. The next prime is 444418663841. The reversal of 444418663840 is 48366814444.

It is a super-3 number, since 3×444418663840³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (444418663841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504705 + ... + 1069375.

It is an arithmetic number, because the mean of its divisors is an integer number (21878216640).

Almost surely, 2^444418663840 is an apocalyptic number.

444418663840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

444418663840 is an abundant number, since it is smaller than the sum of its proper divisors (605735734880).

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

444418663840 is a wasteful number, since it uses less digits than its factorization.

444418663840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569605 (or 569597 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 52.

The spelling of 444418663840 in words is "four hundred forty-four billion, four hundred eighteen million, six hundred sixty-three thousand, eight hundred forty".