650520161 has 2 divisors, whose sum is σ = 650520162. Its totient is φ = 650520160.

The previous prime is 650520149. The next prime is 650520163. The reversal of 650520161 is 161025056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648007936 + 2512225 = 25456^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 650520161 - 2⁶ = 650520097 is a prime.

Together with 650520163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650520161.

It is not a weakly prime, because it can be changed into another prime (650520163) 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, 325260080 + 325260081.

It is an arithmetic number, because the mean of its divisors is an integer number (325260081).

Almost surely, 2^650520161 is an apocalyptic number.

It is an amenable number.

650520161 is a deficient number, since it is larger than the sum of its proper divisors (1).

650520161 is an equidigital number, since it uses as much as digits as its factorization.

650520161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 650520161 is about 25505.2967244061. The cubic root of 650520161 is about 866.4701123459.

The spelling of 650520161 in words is "six hundred fifty million, five hundred twenty thousand, one hundred sixty-one".