3918216563 has 2 divisors, whose sum is σ = 3918216564. Its totient is φ = 3918216562.

The previous prime is 3918216557. The next prime is 3918216581. The reversal of 3918216563 is 3656128193.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3918216563 - 2²⁰ = 3917167987 is a prime.

It is not a weakly prime, because it can be changed into another prime (3918216503) 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, 1959108281 + 1959108282.

It is an arithmetic number, because the mean of its divisors is an integer number (1959108282).

Almost surely, 2^3918216563 is an apocalyptic number.

3918216563 is a deficient number, since it is larger than the sum of its proper divisors (1).

3918216563 is an equidigital number, since it uses as much as digits as its factorization.

3918216563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 3918216563 is about 62595.6592983891. The cubic root of 3918216563 is about 1576.5078782369.

The spelling of 3918216563 in words is "three billion, nine hundred eighteen million, two hundred sixteen thousand, five hundred sixty-three".