164044881 has 96 divisors (see below), whose sum is σ = 322882560. Its totient is φ = 77500800.

The previous prime is 164044873. The next prime is 164044897. The reversal of 164044881 is 188440461.

164044881 is a `hidden beast` number, since 1 + 640 + 4 + 4 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 164044881 - 2³ = 164044873 is a prime.

It is a super-2 number, since 2×164044881² = 53821445964608322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164044981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1180110 + ... + 1180248.

It is an arithmetic number, because the mean of its divisors is an integer number (3363360).

Almost surely, 2^164044881 is an apocalyptic number.

164044881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164044881 is a deficient number, since it is larger than the sum of its proper divisors (158837679).

164044881 is a wasteful number, since it uses less digits than its factorization.

164044881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 164044881 is about 12808.0006636477. Note that the first 3 decimals coincide. The cubic root of 164044881 is about 547.4202948961.

The spelling of 164044881 in words is "one hundred sixty-four million, forty-four thousand, eight hundred eighty-one".