168516251263 has 2 divisors, whose sum is σ = 168516251264. Its totient is φ = 168516251262.

The previous prime is 168516251251. The next prime is 168516251273. The reversal of 168516251263 is 362152615861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168516251263 - 2²¹ = 168514154111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168516251273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84258125631 + 84258125632.

It is an arithmetic number, because the mean of its divisors is an integer number (84258125632).

Almost surely, 2^168516251263 is an apocalyptic number.

168516251263 is a deficient number, since it is larger than the sum of its proper divisors (1).

168516251263 is an equidigital number, since it uses as much as digits as its factorization.

168516251263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 46.

The spelling of 168516251263 in words is "one hundred sixty-eight billion, five hundred sixteen million, two hundred fifty-one thousand, two hundred sixty-three".