11516215169 has 2 divisors, whose sum is σ = 11516215170. Its totient is φ = 11516215168.

The previous prime is 11516215163. The next prime is 11516215171. The reversal of 11516215169 is 96151261511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9674689600 + 1841525569 = 98360^2 + 42913^2 .

It is an emirp because it is prime and its reverse (96151261511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11516215169 is a prime.

It is a super-2 number, since 2×11516215169² (a number of 21 digits) contains 22 as substring.

Together with 11516215171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11516215163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5758107584 + 5758107585.

It is an arithmetic number, because the mean of its divisors is an integer number (5758107585).

Almost surely, 2^11516215169 is an apocalyptic number.

It is an amenable number.

11516215169 is a deficient number, since it is larger than the sum of its proper divisors (1).

11516215169 is an equidigital number, since it uses as much as digits as its factorization.

11516215169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 38.

The spelling of 11516215169 in words is "eleven billion, five hundred sixteen million, two hundred fifteen thousand, one hundred sixty-nine".