161166856082 has 4 divisors (see below), whose sum is σ = 241750284126. Its totient is φ = 80583428040.

The previous prime is 161166856079. The next prime is 161166856127. The reversal of 161166856082 is 280658661161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 280658661161 = 53 ⋅5295446437.

It can be written as a sum of positive squares in only one way, i.e., 120062943001 + 41103913081 = 346501^2 + 202741^2 .

It is a super-2 number, since 2×161166856082² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161166856082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40291714019 + ... + 40291714022.

Almost surely, 2^161166856082 is an apocalyptic number.

161166856082 is a deficient number, since it is larger than the sum of its proper divisors (80583428044).

161166856082 is an equidigital number, since it uses as much as digits as its factorization.

161166856082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80583428043.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 161166856082 in words is "one hundred sixty-one billion, one hundred sixty-six million, eight hundred fifty-six thousand, eighty-two".