168687016871 has 2 divisors, whose sum is σ = 168687016872. Its totient is φ = 168687016870.

The previous prime is 168687016787. The next prime is 168687016891. The reversal of 168687016871 is 178610786861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168687016871 - 2¹⁴ = 168687000487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168687016871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168687016891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84343508435 + 84343508436.

It is an arithmetic number, because the mean of its divisors is an integer number (84343508436).

Almost surely, 2^168687016871 is an apocalyptic number.

168687016871 is a deficient number, since it is larger than the sum of its proper divisors (1).

168687016871 is an equidigital number, since it uses as much as digits as its factorization.

168687016871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 59.

The spelling of 168687016871 in words is "one hundred sixty-eight billion, six hundred eighty-seven million, sixteen thousand, eight hundred seventy-one".