9042728645 has 30 divisors (see below), whose sum is σ = 11613666918. Its totient is φ = 6758731056.

The previous prime is 9042728579. The next prime is 9042728663. The reversal of 9042728645 is 5468272409.

9042728645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7234182916 + 1808545729 = 85054^2 + 42527^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9042728645 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9042728645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 210295994 + ... + 210296036.

Almost surely, 2^9042728645 is an apocalyptic number.

It is an amenable number.

9042728645 is a deficient number, since it is larger than the sum of its proper divisors (2570938273).

9042728645 is an frugal number, since it uses more digits than its factorization.

9042728645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 9042728645 is about 95093.2628791336. The cubic root of 9042728645 is about 2083.3704481637.

The spelling of 9042728645 in words is "nine billion, forty-two million, seven hundred twenty-eight thousand, six hundred forty-five".