3630020561 has 2 divisors, whose sum is σ = 3630020562. Its totient is φ = 3630020560.

The previous prime is 3630020543. The next prime is 3630020587. The reversal of 3630020561 is 1650200363.

3630020561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (3630020587) can be obtained adding 3630020561 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2936014225 + 694006336 = 54185^2 + 26344^2 .

It is a cyclic number.

It is not a de Polignac number, because 3630020561 - 2²² = 3625826257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3630020561.

It is not a weakly prime, because it can be changed into another prime (3630020501) by changing a digit.

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 as a sum of consecutive naturals, namely, 1815010280 + 1815010281.

It is an arithmetic number, because the mean of its divisors is an integer number (1815010281).

Almost surely, 2^3630020561 is an apocalyptic number.

It is an amenable number.

3630020561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3630020561 is an equidigital number, since it uses as much as digits as its factorization.

3630020561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 3630020561 is about 60249.6519575010. The cubic root of 3630020561 is about 1536.8672697857.

The spelling of 3630020561 in words is "three billion, six hundred thirty million, twenty thousand, five hundred sixty-one".