2065161157 has 2 divisors, whose sum is σ = 2065161158. Its totient is φ = 2065161156.

The previous prime is 2065161113. The next prime is 2065161187. The reversal of 2065161157 is 7511615602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2064884481 + 276676 = 45441^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 2065161157 - 2⁷ = 2065161029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2065161107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032580578 + 1032580579.

It is an arithmetic number, because the mean of its divisors is an integer number (1032580579).

Almost surely, 2^2065161157 is an apocalyptic number.

It is an amenable number.

2065161157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2065161157 is an equidigital number, since it uses as much as digits as its factorization.

2065161157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 2065161157 is about 45444.0442412424. The cubic root of 2065161157 is about 1273.4580682350.

Adding to 2065161157 its reverse (7511615602), we get a palindrome (9576776759).

The spelling of 2065161157 in words is "two billion, sixty-five million, one hundred sixty-one thousand, one hundred fifty-seven".