164823851 has 4 divisors (see below), whose sum is σ = 165266112. Its totient is φ = 164381592.

The previous prime is 164823829. The next prime is 164823889. The reversal of 164823851 is 158328461.

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 164823851 - 2⁶ = 164823787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164823811) by changing a digit.

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, 220571 + ... + 221316.

It is an arithmetic number, because the mean of its divisors is an integer number (41316528).

Almost surely, 2^164823851 is an apocalyptic number.

164823851 is a deficient number, since it is larger than the sum of its proper divisors (442261).

164823851 is an equidigital number, since it uses as much as digits as its factorization.

164823851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442260.

The product of its digits is 46080, while the sum is 38.

The square root of 164823851 is about 12838.3741571898. The cubic root of 164823851 is about 548.2854053035.

The spelling of 164823851 in words is "one hundred sixty-four million, eight hundred twenty-three thousand, eight hundred fifty-one".