3563661321 has 12 divisors (see below), whose sum is σ = 5615466480. Its totient is φ = 2159794680.

The previous prime is 3563661319. The next prime is 3563661341. The reversal of 3563661321 is 1231663653.

3563661321 is a `hidden beast` number, since 3 + 5 + 6 + 36 + 613 + 2 + 1 = 666.

It is not a de Polignac number, because 3563661321 - 2¹ = 3563661319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3563661341) 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, 17998191 + ... + 17998388.

It is an arithmetic number, because the mean of its divisors is an integer number (467955540).

Almost surely, 2^3563661321 is an apocalyptic number.

It is an amenable number.

3563661321 is a deficient number, since it is larger than the sum of its proper divisors (2051805159).

3563661321 is a wasteful number, since it uses less digits than its factorization.

3563661321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35996596 (or 35996593 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 3563661321 is about 59696.4096156544. The cubic root of 3563661321 is about 1527.4446246097. Note that the first 3 decimals are identical.

The spelling of 3563661321 in words is "three billion, five hundred sixty-three million, six hundred sixty-one thousand, three hundred twenty-one".