161085530310863 has 2 divisors, whose sum is σ = 161085530310864. Its totient is φ = 161085530310862.

The previous prime is 161085530310821. The next prime is 161085530310959. The reversal of 161085530310863 is 368013035580161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161085530310863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161085530310763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80542765155431 + 80542765155432.

It is an arithmetic number, because the mean of its divisors is an integer number (80542765155432).

Almost surely, 2^{161085530310863} is an apocalyptic number.

161085530310863 is a deficient number, since it is larger than the sum of its proper divisors (1).

161085530310863 is an equidigital number, since it uses as much as digits as its factorization.

161085530310863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 161085530310863 in words is "one hundred sixty-one trillion, eighty-five billion, five hundred thirty million, three hundred ten thousand, eight hundred sixty-three".