3661565852 has 12 divisors (see below), whose sum is σ = 7323131760. Its totient is φ = 1569242496.

The previous prime is 3661565819. The next prime is 3661565863. The reversal of 3661565852 is 2585651663.

3661565852 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 3661565797 and 3661565806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65385077 + ... + 65385132.

It is an arithmetic number, because the mean of its divisors is an integer number (610260980).

Almost surely, 2^3661565852 is an apocalyptic number.

It is an amenable number.

3661565852 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3661565852 is a wasteful number, since it uses less digits than its factorization.

3661565852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130770220 (or 130770218 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 47.

The square root of 3661565852 is about 60510.8738327253. The cubic root of 3661565852 is about 1541.3062863716.

The spelling of 3661565852 in words is "three billion, six hundred sixty-one million, five hundred sixty-five thousand, eight hundred fifty-two".