3913630561 has 2 divisors, whose sum is σ = 3913630562. Its totient is φ = 3913630560.

The previous prime is 3913630559. The next prime is 3913630601. The reversal of 3913630561 is 1650363193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3871950625 + 41679936 = 62225^2 + 6456^2 .

It is an emirp because it is prime and its reverse (1650363193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3913630561 - 2¹ = 3913630559 is a prime.

Together with 3913630559, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3913630561.

It is not a weakly prime, because it can be changed into another prime (3913640561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956815280 + 1956815281.

It is an arithmetic number, because the mean of its divisors is an integer number (1956815281).

Almost surely, 2^3913630561 is an apocalyptic number.

It is an amenable number.

3913630561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3913630561 is an equidigital number, since it uses as much as digits as its factorization.

3913630561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 3913630561 is about 62559.0166243044. The cubic root of 3913630561 is about 1575.8925735705.

The spelling of 3913630561 in words is "three billion, nine hundred thirteen million, six hundred thirty thousand, five hundred sixty-one".