16216691269 has 2 divisors, whose sum is σ = 16216691270. Its totient is φ = 16216691268.

The previous prime is 16216691243. The next prime is 16216691287. The reversal of 16216691269 is 96219661261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14224140225 + 1992551044 = 119265^2 + 44638^2 .

It is a cyclic number.

It is not a de Polignac number, because 16216691269 - 2⁵ = 16216691237 is a prime.

It is a super-3 number, since 3×16216691269³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16216691369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108345634 + 8108345635.

It is an arithmetic number, because the mean of its divisors is an integer number (8108345635).

Almost surely, 2^16216691269 is an apocalyptic number.

It is an amenable number.

16216691269 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216691269 is an equidigital number, since it uses as much as digits as its factorization.

16216691269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The spelling of 16216691269 in words is "sixteen billion, two hundred sixteen million, six hundred ninety-one thousand, two hundred sixty-nine".