4445261845 has 16 divisors (see below), whose sum is σ = 5524079472. Its totient is φ = 3431900160.

The previous prime is 4445261809. The next prime is 4445261893. The reversal of 4445261845 is 5481625444.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 954933604 + 3490328241 = 30902^2 + 59079^2 .

It is not a de Polignac number, because 4445261845 - 2⁹ = 4445261333 is a prime.

It is a super-2 number, since 2×4445261845² = 39520705741225608050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121332 + ... + 153661.

It is an arithmetic number, because the mean of its divisors is an integer number (345254967).

Almost surely, 2^4445261845 is an apocalyptic number.

It is an amenable number.

4445261845 is a deficient number, since it is larger than the sum of its proper divisors (1078817627).

4445261845 is a wasteful number, since it uses less digits than its factorization.

4445261845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275112.

The product of its digits is 614400, while the sum is 43.

The square root of 4445261845 is about 66672.7968889861. The cubic root of 4445261845 is about 1644.2421708644.

The spelling of 4445261845 in words is "four billion, four hundred forty-five million, two hundred sixty-one thousand, eight hundred forty-five".