168347825669 has 2 divisors, whose sum is σ = 168347825670. Its totient is φ = 168347825668.

The previous prime is 168347825647. The next prime is 168347825683. The reversal of 168347825669 is 966528743861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167679603169 + 668222500 = 409487^2 + 25850^2 .

It is an emirp because it is prime and its reverse (966528743861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168347825669 is a prime.

It is a super-2 number, since 2×168347825669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168347825699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84173912834 + 84173912835.

It is an arithmetic number, because the mean of its divisors is an integer number (84173912835).

Almost surely, 2^168347825669 is an apocalyptic number.

It is an amenable number.

168347825669 is a deficient number, since it is larger than the sum of its proper divisors (1).

168347825669 is an equidigital number, since it uses as much as digits as its factorization.

168347825669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 65.

The spelling of 168347825669 in words is "one hundred sixty-eight billion, three hundred forty-seven million, eight hundred twenty-five thousand, six hundred sixty-nine".