186168145 has 4 divisors (see below), whose sum is σ = 223401780. Its totient is φ = 148934512.

The previous prime is 186168109. The next prime is 186168163. The reversal of 186168145 is 541861681.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68293696 + 117874449 = 8264^2 + 10857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186168145 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 186168098 and 186168107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18616810 + ... + 18616819.

It is an arithmetic number, because the mean of its divisors is an integer number (55850445).

Almost surely, 2^186168145 is an apocalyptic number.

It is an amenable number.

186168145 is a deficient number, since it is larger than the sum of its proper divisors (37233635).

186168145 is an equidigital number, since it uses as much as digits as its factorization.

186168145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37233634.

The product of its digits is 46080, while the sum is 40.

The square root of 186168145 is about 13644.3447992199. The cubic root of 186168145 is about 570.9987056813.

The spelling of 186168145 in words is "one hundred eighty-six million, one hundred sixty-eight thousand, one hundred forty-five".