65235897161 has 2 divisors, whose sum is σ = 65235897162. Its totient is φ = 65235897160.

The previous prime is 65235897151. The next prime is 65235897173. The reversal of 65235897161 is 16179853256.

It is a happy number.

65235897161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56012215561 + 9223681600 = 236669^2 + 96040^2 .

It is a cyclic number.

It is not a de Polignac number, because 65235897161 - 2¹⁰ = 65235896137 is a prime.

It is not a weakly prime, because it can be changed into another prime (65235897131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32617948580 + 32617948581.

It is an arithmetic number, because the mean of its divisors is an integer number (32617948581).

Almost surely, 2^65235897161 is an apocalyptic number.

It is an amenable number.

65235897161 is a deficient number, since it is larger than the sum of its proper divisors (1).

65235897161 is an equidigital number, since it uses as much as digits as its factorization.

65235897161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 53.

The spelling of 65235897161 in words is "sixty-five billion, two hundred thirty-five million, eight hundred ninety-seven thousand, one hundred sixty-one".