161056618044193 has 2 divisors, whose sum is σ = 161056618044194. Its totient is φ = 161056618044192.

The previous prime is 161056618044181. The next prime is 161056618044281. The reversal of 161056618044193 is 391440816650161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129688183877184 + 31368434167009 = 11388072^2 + 5600753^2 .

It is a cyclic number.

It is not a de Polignac number, because 161056618044193 - 2⁹ = 161056618043681 is a prime.

It is not a weakly prime, because it can be changed into another prime (161056618044103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80528309022096 + 80528309022097.

It is an arithmetic number, because the mean of its divisors is an integer number (80528309022097).

Almost surely, 2^{161056618044193} is an apocalyptic number.

It is an amenable number.

161056618044193 is a deficient number, since it is larger than the sum of its proper divisors (1).

161056618044193 is an equidigital number, since it uses as much as digits as its factorization.

161056618044193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 161056618044193 in words is "one hundred sixty-one trillion, fifty-six billion, six hundred eighteen million, forty-four thousand, one hundred ninety-three".