168540058132991 has 2 divisors, whose sum is σ = 168540058132992. Its totient is φ = 168540058132990.

The previous prime is 168540058132981. The next prime is 168540058133089. The reversal of 168540058132991 is 199231850045861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168540058132991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168540058132921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84270029066495 + 84270029066496.

It is an arithmetic number, because the mean of its divisors is an integer number (84270029066496).

Almost surely, 2^{168540058132991} is an apocalyptic number.

168540058132991 is a deficient number, since it is larger than the sum of its proper divisors (1).

168540058132991 is an equidigital number, since it uses as much as digits as its factorization.

168540058132991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18662400, while the sum is 62.

The spelling of 168540058132991 in words is "one hundred sixty-eight trillion, five hundred forty billion, fifty-eight million, one hundred thirty-two thousand, nine hundred ninety-one".