2013445665 has 96 divisors (see below), whose sum is σ = 4400697600. Its totient is φ = 827228160.

The previous prime is 2013445663. The next prime is 2013445697. The reversal of 2013445665 is 5665443102.

2013445665 is a `hidden beast` number, since 201 + 3 + 445 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 2013445665 - 2¹ = 2013445663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2013445663) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 305121 + ... + 311649.

It is an arithmetic number, because the mean of its divisors is an integer number (45840600).

Almost surely, 2^2013445665 is an apocalyptic number.

It is an amenable number.

2013445665 is an abundant number, since it is smaller than the sum of its proper divisors (2387251935).

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

2013445665 is a wasteful number, since it uses less digits than its factorization.

2013445665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647 (or 6644 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2013445665 is about 44871.4348444531. The cubic root of 2013445665 is about 1262.7381590376.

Adding to 2013445665 its reverse (5665443102), we get a palindrome (7678888767).

The spelling of 2013445665 in words is "two billion, thirteen million, four hundred forty-five thousand, six hundred sixty-five".