168786445 has 4 divisors (see below), whose sum is σ = 202543740. Its totient is φ = 135029152.

The previous prime is 168786419. The next prime is 168786469. The reversal of 168786445 is 544687861.

168786445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544687861 = 197 ⋅2764913.

It can be written as a sum of positive squares in 2 ways, for example, as 28079401 + 140707044 = 5299^2 + 11862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168786445 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 16878640 + ... + 16878649.

It is an arithmetic number, because the mean of its divisors is an integer number (50635935).

Almost surely, 2^168786445 is an apocalyptic number.

It is an amenable number.

168786445 is a deficient number, since it is larger than the sum of its proper divisors (33757295).

168786445 is an equidigital number, since it uses as much as digits as its factorization.

168786445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33757294.

The product of its digits is 1290240, while the sum is 49.

The square root of 168786445 is about 12991.7837497397. The cubic root of 168786445 is about 552.6445040148.

The spelling of 168786445 in words is "one hundred sixty-eight million, seven hundred eighty-six thousand, four hundred forty-five".