3645461065 has 4 divisors (see below), whose sum is σ = 4374553284. Its totient is φ = 2916368848.

The previous prime is 3645461063. The next prime is 3645461117. The reversal of 3645461065 is 5601645463.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2449062144 + 1196398921 = 49488^2 + 34589^2 .

It is a cyclic number.

It is not a de Polignac number, because 3645461065 - 2¹ = 3645461063 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3645461063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364546102 + ... + 364546111.

It is an arithmetic number, because the mean of its divisors is an integer number (1093638321).

Almost surely, 2^3645461065 is an apocalyptic number.

It is an amenable number.

3645461065 is a deficient number, since it is larger than the sum of its proper divisors (729092219).

3645461065 is an equidigital number, since it uses as much as digits as its factorization.

3645461065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729092218.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 3645461065 is about 60377.6536890926. The cubic root of 3645461065 is about 1539.0432389901.

The spelling of 3645461065 in words is "three billion, six hundred forty-five million, four hundred sixty-one thousand, sixty-five".