1606217363669 has 2 divisors, whose sum is σ = 1606217363670. Its totient is φ = 1606217363668.

The previous prime is 1606217363609. The next prime is 1606217363671. The reversal of 1606217363669 is 9663637126061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1598934960100 + 7282403569 = 1264490^2 + 85337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606217363669 - 2³⁶ = 1537497886933 is a prime.

It is a super-2 number, since 2×1606217363669² (a number of 25 digits) contains 22 as substring.

Together with 1606217363671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606217363609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803108681834 + 803108681835.

It is an arithmetic number, because the mean of its divisors is an integer number (803108681835).

Almost surely, 2^{1606217363669} is an apocalyptic number.

It is an amenable number.

1606217363669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606217363669 is an equidigital number, since it uses as much as digits as its factorization.

1606217363669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 56.

The spelling of 1606217363669 in words is "one trillion, six hundred six billion, two hundred seventeen million, three hundred sixty-three thousand, six hundred sixty-nine".