3563809965 has 12 divisors (see below), whose sum is σ = 6177270684. Its totient is φ = 1900698624.

The previous prime is 3563809961. The next prime is 3563809967. The reversal of 3563809965 is 5699083653.

It can be written as a sum of positive squares in 2 ways, for example, as 1831668804 + 1732141161 = 42798^2 + 41619^2 .

It is not a de Polignac number, because 3563809965 - 2² = 3563809961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3563809961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39597844 + ... + 39597933.

It is an arithmetic number, because the mean of its divisors is an integer number (514772557).

Almost surely, 2^3563809965 is an apocalyptic number.

It is an amenable number.

3563809965 is a deficient number, since it is larger than the sum of its proper divisors (2613460719).

3563809965 is a wasteful number, since it uses less digits than its factorization.

3563809965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79195788 (or 79195785 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The square root of 3563809965 is about 59697.6546021701. The cubic root of 3563809965 is about 1527.4658614128.

The spelling of 3563809965 in words is "three billion, five hundred sixty-three million, eight hundred nine thousand, nine hundred sixty-five".