161886186142 has 8 divisors (see below), whose sum is σ = 242878419936. Its totient is φ = 80926712832.

The previous prime is 161886186131. The next prime is 161886186151. The reversal of 161886186142 is 241681688161.

161886186142 is digitally balanced in base 2, 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 self number, because there is not a number n which added to its sum of digits gives 161886186142.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8177763 + ... + 8197534.

It is an arithmetic number, because the mean of its divisors is an integer number (30359802492).

Almost surely, 2^161886186142 is an apocalyptic number.

161886186142 is a deficient number, since it is larger than the sum of its proper divisors (80992233794).

161886186142 is a wasteful number, since it uses less digits than its factorization.

161886186142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380242.

The product of its digits is 884736, while the sum is 52.

The spelling of 161886186142 in words is "one hundred sixty-one billion, eight hundred eighty-six million, one hundred eighty-six thousand, one hundred forty-two".