3645665717 has 12 divisors (see below), whose sum is σ = 3851512236. Its totient is φ = 3450314880.

The previous prime is 3645665701. The next prime is 3645665741. The reversal of 3645665717 is 7175665463.

It can be written as a sum of positive squares in 2 ways, for example, as 2055171556 + 1590494161 = 45334^2 + 39881^2 .

It is not a de Polignac number, because 3645665717 - 2⁴ = 3645665701 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 (3645665747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398717 + ... + 407757.

It is an arithmetic number, because the mean of its divisors is an integer number (320959353).

Almost surely, 2^3645665717 is an apocalyptic number.

It is an amenable number.

3645665717 is a deficient number, since it is larger than the sum of its proper divisors (205846519).

3645665717 is a wasteful number, since it uses less digits than its factorization.

3645665717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196 (or 10177 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 50.

The square root of 3645665717 is about 60379.3484313966. The cubic root of 3645665717 is about 1539.0720384915.

The spelling of 3645665717 in words is "three billion, six hundred forty-five million, six hundred sixty-five thousand, seven hundred seventeen".