168100644884069 has 2 divisors, whose sum is σ = 168100644884070. Its totient is φ = 168100644884068.

The previous prime is 168100644884033. The next prime is 168100644884071. The reversal of 168100644884069 is 960488446001861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114039182861569 + 54061462022500 = 10678913^2 + 7352650^2 .

It is a cyclic number.

It is not a de Polignac number, because 168100644884069 - 2²⁰ = 168100643835493 is a prime.

It is a super-2 number, since 2×168100644884069² (a number of 29 digits) contains 22 as substring.

Together with 168100644884071, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 168100644883996 and 168100644884014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168100644884009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84050322442034 + 84050322442035.

It is an arithmetic number, because the mean of its divisors is an integer number (84050322442035).

Almost surely, 2^{168100644884069} is an apocalyptic number.

It is an amenable number.

168100644884069 is a deficient number, since it is larger than the sum of its proper divisors (1).

168100644884069 is an equidigital number, since it uses as much as digits as its factorization.

168100644884069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63700992, while the sum is 65.

The spelling of 168100644884069 in words is "one hundred sixty-eight trillion, one hundred billion, six hundred forty-four million, eight hundred eighty-four thousand, sixty-nine".