4445665144 has 32 divisors (see below), whose sum is σ = 9011494800. Its totient is φ = 2048924160.

The previous prime is 4445665127. The next prime is 4445665151. The reversal of 4445665144 is 4415665444.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4445665144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389617 + ... + 400864.

Almost surely, 2^4445665144 is an apocalyptic number.

It is an amenable number.

4445665144 is an abundant number, since it is smaller than the sum of its proper divisors (4565829656).

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

4445665144 is a wasteful number, since it uses less digits than its factorization.

4445665144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790543 (or 790539 counting only the distinct ones).

The product of its digits is 921600, while the sum is 43.

The square root of 4445665144 is about 66675.8212847806. The cubic root of 4445665144 is about 1644.2918943073.

The spelling of 4445665144 in words is "four billion, four hundred forty-five million, six hundred sixty-five thousand, one hundred forty-four".