4644650161 has 2 divisors, whose sum is σ = 4644650162. Its totient is φ = 4644650160.

The previous prime is 4644650159. The next prime is 4644650207. The reversal of 4644650161 is 1610564464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3771802225 + 872847936 = 61415^2 + 29544^2 .

It is a cyclic number.

It is not a de Polignac number, because 4644650161 - 2¹ = 4644650159 is a prime.

Together with 4644650159, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4644650161.

It is not a weakly prime, because it can be changed into another prime (4644650141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322325080 + 2322325081.

It is an arithmetic number, because the mean of its divisors is an integer number (2322325081).

Almost surely, 2^4644650161 is an apocalyptic number.

It is an amenable number.

4644650161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4644650161 is an equidigital number, since it uses as much as digits as its factorization.

4644650161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 4644650161 is about 68151.6702730021. The cubic root of 4644650161 is about 1668.4671846117.

The spelling of 4644650161 in words is "four billion, six hundred forty-four million, six hundred fifty thousand, one hundred sixty-one".