64650161 has 2 divisors, whose sum is σ = 64650162. Its totient is φ = 64650160.

The previous prime is 64650121. The next prime is 64650169. The reversal of 64650161 is 16105646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42981136 + 21669025 = 6556^2 + 4655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64650161 is a prime.

It is not a weakly prime, because it can be changed into another prime (64650169) 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, 32325080 + 32325081.

It is an arithmetic number, because the mean of its divisors is an integer number (32325081).

Almost surely, 2^64650161 is an apocalyptic number.

It is an amenable number.

64650161 is a deficient number, since it is larger than the sum of its proper divisors (1).

64650161 is an equidigital number, since it uses as much as digits as its factorization.

64650161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 64650161 is about 8040.5323828712. The cubic root of 64650161 is about 401.3499411058.

The spelling of 64650161 in words is "sixty-four million, six hundred fifty thousand, one hundred sixty-one".