4045489861 has 16 divisors (see below), whose sum is σ = 4869072000. Its totient is φ = 3283495488.

The previous prime is 4045489859. The next prime is 4045489873. The reversal of 4045489861 is 1689845404.

It is a happy number.

It is not a de Polignac number, because 4045489861 - 2¹ = 4045489859 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 (4045489961) 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, 333051 + ... + 344983.

It is an arithmetic number, because the mean of its divisors is an integer number (304317000).

Almost surely, 2^4045489861 is an apocalyptic number.

It is an amenable number.

4045489861 is a deficient number, since it is larger than the sum of its proper divisors (823582139).

4045489861 is a wasteful number, since it uses less digits than its factorization.

4045489861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14508.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The square root of 4045489861 is about 63604.1654374932. The cubic root of 4045489861 is about 1593.3959379658.

The spelling of 4045489861 in words is "four billion, forty-five million, four hundred eighty-nine thousand, eight hundred sixty-one".