2065365161 has 4 divisors (see below), whose sum is σ = 2065599492. Its totient is φ = 2065130832.

The previous prime is 2065365157. The next prime is 2065365191. The reversal of 2065365161 is 1615635602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329059600 + 1736305561 = 18140^2 + 41669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2065365161 - 2² = 2065365157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2065365101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103406 + ... + 121751.

It is an arithmetic number, because the mean of its divisors is an integer number (516399873).

Almost surely, 2^2065365161 is an apocalyptic number.

It is an amenable number.

2065365161 is a deficient number, since it is larger than the sum of its proper divisors (234331).

2065365161 is an equidigital number, since it uses as much as digits as its factorization.

2065365161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234330.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 2065365161 is about 45446.2887483676. The cubic root of 2065365161 is about 1273.4999991008.

The spelling of 2065365161 in words is "two billion, sixty-five million, three hundred sixty-five thousand, one hundred sixty-one".