164500081 has 8 divisors (see below), whose sum is σ = 173364800. Its totient is φ = 155656080.

The previous prime is 164500073. The next prime is 164500099. The reversal of 164500081 is 180005461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164500081 - 2³ = 164500073 is a prime.

It is a super-2 number, since 2×164500081² = 54120553298013122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164500001) 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 7 ways as a sum of consecutive naturals, for example, 12751 + ... + 22171.

It is an arithmetic number, because the mean of its divisors is an integer number (21670600).

Almost surely, 2^164500081 is an apocalyptic number.

It is an amenable number.

164500081 is a deficient number, since it is larger than the sum of its proper divisors (8864719).

164500081 is an equidigital number, since it uses as much as digits as its factorization.

164500081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10359.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 164500081 is about 12825.7584960890. The cubic root of 164500081 is about 547.9261637515.

The spelling of 164500081 in words is "one hundred sixty-four million, five hundred thousand, eighty-one".