2116161361 has 2 divisors, whose sum is σ = 2116161362. Its totient is φ = 2116161360.

The previous prime is 2116161329. The next prime is 2116161367. The reversal of 2116161361 is 1631616112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2085292225 + 30869136 = 45665^2 + 5556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116161361 - 2⁵ = 2116161329 is a prime.

It is not a weakly prime, because it can be changed into another prime (2116161367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058080680 + 1058080681.

It is an arithmetic number, because the mean of its divisors is an integer number (1058080681).

Almost surely, 2^2116161361 is an apocalyptic number.

It is an amenable number.

2116161361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116161361 is an equidigital number, since it uses as much as digits as its factorization.

2116161361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 2116161361 is about 46001.7538904768. The cubic root of 2116161361 is about 1283.8558375120.

Adding to 2116161361 its reverse (1631616112), we get a palindrome (3747777473).

The spelling of 2116161361 in words is "two billion, one hundred sixteen million, one hundred sixty-one thousand, three hundred sixty-one".