164561844 has 24 divisors (see below), whose sum is σ = 384531840. Its totient is φ = 54774784.

The previous prime is 164561779. The next prime is 164561851. The reversal of 164561844 is 448165461.

164561844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 909 + ... + 18164.

It is an arithmetic number, because the mean of its divisors is an integer number (16022160).

Almost surely, 2^164561844 is an apocalyptic number.

It is an amenable number.

164561844 is an abundant number, since it is smaller than the sum of its proper divisors (219969996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164561844 is a wasteful number, since it uses less digits than its factorization.

164561844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19799 (or 19797 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 164561844 is about 12828.1660419563. The cubic root of 164561844 is about 547.9947297342.

The spelling of 164561844 in words is "one hundred sixty-four million, five hundred sixty-one thousand, eight hundred forty-four".