161011072117161 has 24 divisors (see below), whose sum is σ = 271220464860800. Its totient is φ = 92006326922328.

The previous prime is 161011072117109. The next prime is 161011072117183. The reversal of 161011072117161 is 161711270110161.

161011072117161 is a `hidden beast` number, since 1 + 610 + 1 + 1 + 0 + 7 + 21 + 1 + 7 + 16 + 1 = 666.

It is not a de Polignac number, because 161011072117161 - 2⁹ = 161011072116649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161011077117161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26078887765 + ... + 26078893938.

Almost surely, 2^{161011072117161} is an apocalyptic number.

It is an amenable number.

161011072117161 is a deficient number, since it is larger than the sum of its proper divisors (110209392743639).

161011072117161 is an equidigital number, since it uses as much as digits as its factorization.

161011072117161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52157781730 (or 52157781713 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 36.

The spelling of 161011072117161 in words is "one hundred sixty-one trillion, eleven billion, seventy-two million, one hundred seventeen thousand, one hundred sixty-one".