164808481 has 2 divisors, whose sum is σ = 164808482. Its totient is φ = 164808480.

The previous prime is 164808473. The next prime is 164808491. The reversal of 164808481 is 184808461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162792081 + 2016400 = 12759^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 164808481 - 2³ = 164808473 is a prime.

It is a super-2 number, since 2×164808481² = 54323670819054722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164808401) by changing a digit.

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 as a sum of consecutive naturals, namely, 82404240 + 82404241.

It is an arithmetic number, because the mean of its divisors is an integer number (82404241).

Almost surely, 2^164808481 is an apocalyptic number.

It is an amenable number.

164808481 is a deficient number, since it is larger than the sum of its proper divisors (1).

164808481 is an equidigital number, since it uses as much as digits as its factorization.

164808481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 164808481 is about 12837.7755471889. The cubic root of 164808481 is about 548.2683620407.

The spelling of 164808481 in words is "one hundred sixty-four million, eight hundred eight thousand, four hundred eighty-one".