161346186 has 12 divisors (see below), whose sum is σ = 349583442. Its totient is φ = 53782056.

The previous prime is 161346181. The next prime is 161346221. The reversal of 161346186 is 681643161.

161346186 is a `hidden beast` number, since 1 + 6 + 1 + 34 + 618 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 160655625 + 690561 = 12675^2 + 831^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161346186.

It is not an unprimeable number, because it can be changed into a prime (161346181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4481821 + ... + 4481856.

Almost surely, 2^161346186 is an apocalyptic number.

161346186 is an abundant number, since it is smaller than the sum of its proper divisors (188237256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161346186 is a wasteful number, since it uses less digits than its factorization.

161346186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963685 (or 8963682 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 161346186 is about 12702.2118546338. The cubic root of 161346186 is about 544.4018193510.

The spelling of 161346186 in words is "one hundred sixty-one million, three hundred forty-six thousand, one hundred eighty-six".