167868215849791 has 2 divisors, whose sum is σ = 167868215849792. Its totient is φ = 167868215849790.

The previous prime is 167868215849779. The next prime is 167868215849843. The reversal of 167868215849791 is 197948512868761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 167868215849791 - 2¹¹ = 167868215847743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167868215849701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83934107924895 + 83934107924896.

It is an arithmetic number, because the mean of its divisors is an integer number (83934107924896).

Almost surely, 2^{167868215849791} is an apocalyptic number.

167868215849791 is a deficient number, since it is larger than the sum of its proper divisors (1).

167868215849791 is an equidigital number, since it uses as much as digits as its factorization.

167868215849791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2926264320, while the sum is 82.

The spelling of 167868215849791 in words is "one hundred sixty-seven trillion, eight hundred sixty-eight billion, two hundred fifteen million, eight hundred forty-nine thousand, seven hundred ninety-one".