168256163 has 2 divisors, whose sum is σ = 168256164. Its totient is φ = 168256162.

The previous prime is 168256133. The next prime is 168256181. The reversal of 168256163 is 361652861.

It is a strong prime.

It is an emirp because it is prime and its reverse (361652861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168256163 - 2¹⁸ = 167994019 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (168256133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84128081 + 84128082.

It is an arithmetic number, because the mean of its divisors is an integer number (84128082).

Almost surely, 2^168256163 is an apocalyptic number.

168256163 is a deficient number, since it is larger than the sum of its proper divisors (1).

168256163 is an equidigital number, since it uses as much as digits as its factorization.

168256163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 168256163 is about 12971.3593350890. The cubic root of 168256163 is about 552.0651429719.

The spelling of 168256163 in words is "one hundred sixty-eight million, two hundred fifty-six thousand, one hundred sixty-three".