168072780191 has 2 divisors, whose sum is σ = 168072780192. Its totient is φ = 168072780190.

The previous prime is 168072780179. The next prime is 168072780203. The reversal of 168072780191 is 191087270861.

It is a balanced prime because it is at equal distance from previous prime (168072780179) and next prime (168072780203).

It is an emirp because it is prime and its reverse (191087270861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168072780191 - 2¹⁰ = 168072779167 is a prime.

It is a super-2 number, since 2×168072780191² (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 (168072780691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84036390095 + 84036390096.

It is an arithmetic number, because the mean of its divisors is an integer number (84036390096).

Almost surely, 2^168072780191 is an apocalyptic number.

168072780191 is a deficient number, since it is larger than the sum of its proper divisors (1).

168072780191 is an equidigital number, since it uses as much as digits as its factorization.

168072780191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 50.

The spelling of 168072780191 in words is "one hundred sixty-eight billion, seventy-two million, seven hundred eighty thousand, one hundred ninety-one".