649558163 has 2 divisors, whose sum is σ = 649558164. Its totient is φ = 649558162.

The previous prime is 649558109. The next prime is 649558177. The reversal of 649558163 is 361855946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649558163 - 2²⁴ = 632780947 is a prime.

It is not a weakly prime, because it can be changed into another prime (649558103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324779081 + 324779082.

It is an arithmetic number, because the mean of its divisors is an integer number (324779082).

Almost surely, 2^649558163 is an apocalyptic number.

649558163 is a deficient number, since it is larger than the sum of its proper divisors (1).

649558163 is an equidigital number, since it uses as much as digits as its factorization.

649558163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 47.

The square root of 649558163 is about 25486.4309584532. The cubic root of 649558163 is about 866.0427857296.

The spelling of 649558163 in words is "six hundred forty-nine million, five hundred fifty-eight thousand, one hundred sixty-three".