3659819645 has 4 divisors (see below), whose sum is σ = 4391783580. Its totient is φ = 2927855712.

The previous prime is 3659819609. The next prime is 3659819701. The reversal of 3659819645 is 5469189563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5469189563 = 34231 ⋅159773.

It can be written as a sum of positive squares in 2 ways, for example, as 1424232121 + 2235587524 = 37739^2 + 47282^2 .

It is a cyclic number.

It is not a de Polignac number, because 3659819645 - 2⁸ = 3659819389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 365981960 + ... + 365981969.

It is an arithmetic number, because the mean of its divisors is an integer number (1097945895).

Almost surely, 2^3659819645 is an apocalyptic number.

It is an amenable number.

3659819645 is a deficient number, since it is larger than the sum of its proper divisors (731963935).

3659819645 is an equidigital number, since it uses as much as digits as its factorization.

3659819645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731963934.

The product of its digits is 6998400, while the sum is 56.

The square root of 3659819645 is about 60496.4432425577. The cubic root of 3659819645 is about 1541.0612302126.

The spelling of 3659819645 in words is "three billion, six hundred fifty-nine million, eight hundred nineteen thousand, six hundred forty-five".