168173053609669 has 2 divisors, whose sum is σ = 168173053609670. Its totient is φ = 168173053609668.

The previous prime is 168173053609667. The next prime is 168173053609681. The reversal of 168173053609669 is 966906350371861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152441914547169 + 15731139062500 = 12346737^2 + 3966250^2 .

It is a cyclic number.

It is not a de Polignac number, because 168173053609669 - 2¹ = 168173053609667 is a prime.

It is a super-2 number, since 2×168173053609669² (a number of 29 digits) contains 22 as substring.

Together with 168173053609667, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 168173053609598 and 168173053609607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168173053609661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84086526804834 + 84086526804835.

It is an arithmetic number, because the mean of its divisors is an integer number (84086526804835).

Almost surely, 2^{168173053609669} is an apocalyptic number.

It is an amenable number.

168173053609669 is a deficient number, since it is larger than the sum of its proper divisors (1).

168173053609669 is an equidigital number, since it uses as much as digits as its factorization.

168173053609669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264539520, while the sum is 70.

The spelling of 168173053609669 in words is "one hundred sixty-eight trillion, one hundred seventy-three billion, fifty-three million, six hundred nine thousand, six hundred sixty-nine".