164455985 has 8 divisors (see below), whose sum is σ = 197799360. Its totient is φ = 131263344.

The previous prime is 164455981. The next prime is 164455997. The reversal of 164455985 is 589554461.

164455985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 164455985 - 2² = 164455981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164455981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35267 + ... + 39656.

It is an arithmetic number, because the mean of its divisors is an integer number (24724920).

Almost surely, 2^164455985 is an apocalyptic number.

It is an amenable number.

164455985 is a deficient number, since it is larger than the sum of its proper divisors (33343375).

164455985 is an equidigital number, since it uses as much as digits as its factorization.

164455985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75367.

The product of its digits is 864000, while the sum is 47.

The square root of 164455985 is about 12824.0393402391. The cubic root of 164455985 is about 547.8772002268.

The spelling of 164455985 in words is "one hundred sixty-four million, four hundred fifty-five thousand, nine hundred eighty-five".