65633280161 has 2 divisors, whose sum is σ = 65633280162. Its totient is φ = 65633280160.

The previous prime is 65633280131. The next prime is 65633280227. The reversal of 65633280161 is 16108233656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60052443136 + 5580837025 = 245056^2 + 74705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65633280161 is a prime.

It is not a weakly prime, because it can be changed into another prime (65633280121) 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, 32816640080 + 32816640081.

It is an arithmetic number, because the mean of its divisors is an integer number (32816640081).

Almost surely, 2^65633280161 is an apocalyptic number.

It is an amenable number.

65633280161 is a deficient number, since it is larger than the sum of its proper divisors (1).

65633280161 is an equidigital number, since it uses as much as digits as its factorization.

65633280161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 65633280161 in words is "sixty-five billion, six hundred thirty-three million, two hundred eighty thousand, one hundred sixty-one".