649648163 has 2 divisors, whose sum is σ = 649648164. Its totient is φ = 649648162.

The previous prime is 649648093. The next prime is 649648193. The reversal of 649648163 is 361846946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649648163 - 2⁸ = 649647907 is a prime.

It is not a weakly prime, because it can be changed into another prime (649648193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324824081 + 324824082.

It is an arithmetic number, because the mean of its divisors is an integer number (324824082).

Almost surely, 2^649648163 is an apocalyptic number.

649648163 is a deficient number, since it is larger than the sum of its proper divisors (1).

649648163 is an equidigital number, since it uses as much as digits as its factorization.

649648163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The square root of 649648163 is about 25488.1965427136. The cubic root of 649648163 is about 866.0827822768.

The spelling of 649648163 in words is "six hundred forty-nine million, six hundred forty-eight thousand, one hundred sixty-three".