164865577 has 2 divisors, whose sum is σ = 164865578. Its totient is φ = 164865576.

The previous prime is 164865559. The next prime is 164865581. The reversal of 164865577 is 775568461.

It is a happy number.

164865577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108555561 + 56310016 = 10419^2 + 7504^2 .

It is a cyclic number.

It is not a de Polignac number, because 164865577 - 2²⁷ = 30647849 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164865577.

It is not a weakly prime, because it can be changed into another prime (164865517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82432788 + 82432789.

It is an arithmetic number, because the mean of its divisors is an integer number (82432789).

Almost surely, 2^164865577 is an apocalyptic number.

It is an amenable number.

164865577 is a deficient number, since it is larger than the sum of its proper divisors (1).

164865577 is an equidigital number, since it uses as much as digits as its factorization.

164865577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 49.

The square root of 164865577 is about 12839.9991043613. Note that the first 3 decimals coincide. The cubic root of 164865577 is about 548.3316684837.

The spelling of 164865577 in words is "one hundred sixty-four million, eight hundred sixty-five thousand, five hundred seventy-seven".