2170643663 has 2 divisors, whose sum is σ = 2170643664. Its totient is φ = 2170643662.

The previous prime is 2170643641. The next prime is 2170643681. The reversal of 2170643663 is 3663460712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2170643663 - 2¹⁸ = 2170381519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2170643603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085321831 + 1085321832.

It is an arithmetic number, because the mean of its divisors is an integer number (1085321832).

Almost surely, 2^2170643663 is an apocalyptic number.

2170643663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170643663 is an equidigital number, since it uses as much as digits as its factorization.

2170643663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 2170643663 is about 46590.1670205205. The cubic root of 2170643663 is about 1294.7805838659.

The spelling of 2170643663 in words is "two billion, one hundred seventy million, six hundred forty-three thousand, six hundred sixty-three".