3561620663 has 2 divisors, whose sum is σ = 3561620664. Its totient is φ = 3561620662.

The previous prime is 3561620653. The next prime is 3561620687. The reversal of 3561620663 is 3660261653.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3561620663 - 2⁶ = 3561620599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3561620653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780810331 + 1780810332.

It is an arithmetic number, because the mean of its divisors is an integer number (1780810332).

Almost surely, 2^3561620663 is an apocalyptic number.

3561620663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561620663 is an equidigital number, since it uses as much as digits as its factorization.

3561620663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 3561620663 is about 59679.3152021703. The cubic root of 3561620663 is about 1527.1530156003.

The spelling of 3561620663 in words is "three billion, five hundred sixty-one million, six hundred twenty thousand, six hundred sixty-three".