4445641165 has 16 divisors (see below), whose sum is σ = 6123057408. Its totient is φ = 3035350656.

The previous prime is 4445641163. The next prime is 4445641171. The reversal of 4445641165 is 5611465444.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4445641165 - 2¹ = 4445641163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445641163) 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 15 ways as a sum of consecutive naturals, for example, 264417 + ... + 280726.

It is an arithmetic number, because the mean of its divisors is an integer number (382691088).

Almost surely, 2^4445641165 is an apocalyptic number.

It is an amenable number.

4445641165 is a deficient number, since it is larger than the sum of its proper divisors (1677416243).

4445641165 is a wasteful number, since it uses less digits than its factorization.

4445641165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545388.

The product of its digits is 230400, while the sum is 40.

The square root of 4445641165 is about 66675.6414667306. The cubic root of 4445641165 is about 1644.2889379783.

The spelling of 4445641165 in words is "four billion, four hundred forty-five million, six hundred forty-one thousand, one hundred sixty-five".