161175752089 has 9 divisors (see below), whose sum is σ = 177164978431. Its totient is φ = 146519396320.

The previous prime is 161175752083. The next prime is 161175752113. The reversal of 161175752089 is 980257571161.

The square root of 161175752089 is 401467.

It is a perfect power (a square), and thus also a powerful number.

161175752089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 160893243225 + 282508864 = 401115^2 + 16808^2 .

It is not a de Polignac number, because 161175752089 - 2¹⁵ = 161175719321 is a prime.

It is a super-2 number, since 2×161175752089² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161175752083) 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 in 8 ways as a sum of consecutive naturals, for example, 4397889 + ... + 4434385.

Almost surely, 2^161175752089 is an apocalyptic number.

161175752089 is the 401467-th square number.

161175752089 is the 200734-th centered octagonal number.

It is an amenable number.

161175752089 is a deficient number, since it is larger than the sum of its proper divisors (15989226342).

161175752089 is an frugal number, since it uses more digits than its factorization.

161175752089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73016 (or 36508 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 52.

The spelling of 161175752089 in words is "one hundred sixty-one billion, one hundred seventy-five million, seven hundred fifty-two thousand, eighty-nine".