164661845 has 8 divisors (see below), whose sum is σ = 197884320. Its totient is φ = 131536080.

The previous prime is 164661839. The next prime is 164661857. The reversal of 164661845 is 548166461.

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

It is not a de Polignac number, because 164661845 - 2⁸ = 164661589 is a prime.

It is a super-2 number, since 2×164661845² = 54227046397608050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20375 + ... + 27284.

It is an arithmetic number, because the mean of its divisors is an integer number (24735540).

Almost surely, 2^164661845 is an apocalyptic number.

It is an amenable number.

164661845 is a deficient number, since it is larger than the sum of its proper divisors (33222475).

164661845 is an equidigital number, since it uses as much as digits as its factorization.

164661845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48355.

The product of its digits is 138240, while the sum is 41.

The square root of 164661845 is about 12832.0631622510. The cubic root of 164661845 is about 548.1057091348.

The spelling of 164661845 in words is "one hundred sixty-four million, six hundred sixty-one thousand, eight hundred forty-five".