65506651169 has 2 divisors, whose sum is σ = 65506651170. Its totient is φ = 65506651168.

The previous prime is 65506651153. The next prime is 65506651193. The reversal of 65506651169 is 96115660556.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53980481569 + 11526169600 = 232337^2 + 107360^2 .

It is a cyclic number.

It is not a de Polignac number, because 65506651169 - 2⁴ = 65506651153 is a prime.

It is a super-2 number, since 2×65506651169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65506651669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32753325584 + 32753325585.

It is an arithmetic number, because the mean of its divisors is an integer number (32753325585).

Almost surely, 2^65506651169 is an apocalyptic number.

It is an amenable number.

65506651169 is a deficient number, since it is larger than the sum of its proper divisors (1).

65506651169 is an equidigital number, since it uses as much as digits as its factorization.

65506651169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 50.

The spelling of 65506651169 in words is "sixty-five billion, five hundred six million, six hundred fifty-one thousand, one hundred sixty-nine".