161886186143 has 4 divisors (see below), whose sum is σ = 176603112168. Its totient is φ = 147169260120.

The previous prime is 161886186131. The next prime is 161886186151. The reversal of 161886186143 is 341681688161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161886186143 - 2²² = 161881991839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161886186743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7358462996 + ... + 7358463017.

It is an arithmetic number, because the mean of its divisors is an integer number (44150778042).

Almost surely, 2^161886186143 is an apocalyptic number.

161886186143 is a deficient number, since it is larger than the sum of its proper divisors (14716926025).

161886186143 is a wasteful number, since it uses less digits than its factorization.

161886186143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14716926024.

The product of its digits is 1327104, while the sum is 53.

The spelling of 161886186143 in words is "one hundred sixty-one billion, eight hundred eighty-six million, one hundred eighty-six thousand, one hundred forty-three".