4445665444 has 48 divisors (see below), whose sum is σ = 8993799360. Its totient is φ = 1900328960.

The previous prime is 4445665379. The next prime is 4445665447.

4445665444 is nontrivially palindromic in base 10.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 4445665394 and 4445665403.

It is not an unprimeable number, because it can be changed into a prime (4445665447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1806687 + ... + 1809145.

It is an arithmetic number, because the mean of its divisors is an integer number (187370820).

Almost surely, 2^4445665444 is an apocalyptic number.

4445665444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4445665444 is an abundant number, since it is smaller than the sum of its proper divisors (4548133916).

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

4445665444 is a wasteful number, since it uses less digits than its factorization.

4445665444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908 (or 4906 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 46.

The square root of 4445665444 is about 66675.8235344716. The cubic root of 4445665444 is about 1644.2919312937.

The spelling of 4445665444 in words is "four billion, four hundred forty-five million, six hundred sixty-five thousand, four hundred forty-four".