164165856 has 24 divisors (see below), whose sum is σ = 430935624. Its totient is φ = 54721920.

The previous prime is 164165819. The next prime is 164165861. The reversal of 164165856 is 658561461.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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, 854935 + ... + 855126.

It is an arithmetic number, because the mean of its divisors is an integer number (17955651).

Almost surely, 2^164165856 is an apocalyptic number.

164165856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164165856 is an abundant number, since it is smaller than the sum of its proper divisors (266769768).

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

164165856 is a wasteful number, since it uses less digits than its factorization.

164165856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710074 (or 1710066 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 164165856 is about 12812.7224273376. The cubic root of 164165856 is about 547.5548269775.

The spelling of 164165856 in words is "one hundred sixty-four million, one hundred sixty-five thousand, eight hundred fifty-six".