649413161 has 2 divisors, whose sum is σ = 649413162. Its totient is φ = 649413160.

The previous prime is 649413113. The next prime is 649413221. The reversal of 649413161 is 161314946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451307536 + 198105625 = 21244^2 + 14075^2 .

It is a cyclic number.

It is not a de Polignac number, because 649413161 - 2²² = 645218857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649413361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324706580 + 324706581.

It is an arithmetic number, because the mean of its divisors is an integer number (324706581).

Almost surely, 2^649413161 is an apocalyptic number.

It is an amenable number.

649413161 is a deficient number, since it is larger than the sum of its proper divisors (1).

649413161 is an equidigital number, since it uses as much as digits as its factorization.

649413161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 649413161 is about 25483.5861094941. The cubic root of 649413161 is about 865.9783381874.

The spelling of 649413161 in words is "six hundred forty-nine million, four hundred thirteen thousand, one hundred sixty-one".