161586018866 has 8 divisors (see below), whose sum is σ = 242410980864. Its totient is φ = 80782358580.

The previous prime is 161586018859. The next prime is 161586018911. The reversal of 161586018866 is 668810685161.

161586018866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161586018866² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5306450 + ... + 5336813.

It is an arithmetic number, because the mean of its divisors is an integer number (30301372608).

Almost surely, 2^161586018866 is an apocalyptic number.

161586018866 is a deficient number, since it is larger than the sum of its proper divisors (80824961998).

161586018866 is a wasteful number, since it uses less digits than its factorization.

161586018866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650856.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 161586018866 in words is "one hundred sixty-one billion, five hundred eighty-six million, eighteen thousand, eight hundred sixty-six".