16105216669 has 2 divisors, whose sum is σ = 16105216670. Its totient is φ = 16105216668.

The previous prime is 16105216661. The next prime is 16105216697. The reversal of 16105216669 is 96661250161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13678472025 + 2426744644 = 116955^2 + 49262^2 .

It is a cyclic number.

It is not a de Polignac number, because 16105216669 - 2³ = 16105216661 is a prime.

It is a super-2 number, since 2×16105216669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16105216661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8052608334 + 8052608335.

It is an arithmetic number, because the mean of its divisors is an integer number (8052608335).

Almost surely, 2^16105216669 is an apocalyptic number.

It is an amenable number.

16105216669 is a deficient number, since it is larger than the sum of its proper divisors (1).

16105216669 is an equidigital number, since it uses as much as digits as its factorization.

16105216669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 16105216669 in words is "sixteen billion, one hundred five million, two hundred sixteen thousand, six hundred sixty-nine".