16516525169 has 2 divisors, whose sum is σ = 16516525170. Its totient is φ = 16516525168.

The previous prime is 16516525079. The next prime is 16516525177. The reversal of 16516525169 is 96152561561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11701830625 + 4814694544 = 108175^2 + 69388^2 .

It is a cyclic number.

It is not a de Polignac number, because 16516525169 - 2²⁸ = 16248089713 is a prime.

It is a super-2 number, since 2×16516525169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16516525369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258262584 + 8258262585.

It is an arithmetic number, because the mean of its divisors is an integer number (8258262585).

Almost surely, 2^16516525169 is an apocalyptic number.

It is an amenable number.

16516525169 is a deficient number, since it is larger than the sum of its proper divisors (1).

16516525169 is an equidigital number, since it uses as much as digits as its factorization.

16516525169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 47.

The spelling of 16516525169 in words is "sixteen billion, five hundred sixteen million, five hundred twenty-five thousand, one hundred sixty-nine".