164465569 has 4 divisors (see below), whose sum is σ = 166718596. Its totient is φ = 162212544.

The previous prime is 164465551. The next prime is 164465593. The reversal of 164465569 is 965564461.

164465569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 965564461 = 3167 ⋅304883.

It can be written as a sum of positive squares in 2 ways, for example, as 127983969 + 36481600 = 11313^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 164465569 - 2⁹ = 164465057 is a prime.

It is a super-2 number, since 2×164465569² = 54097846772987522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164465869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1126404 + ... + 1126549.

It is an arithmetic number, because the mean of its divisors is an integer number (41679649).

Almost surely, 2^164465569 is an apocalyptic number.

It is an amenable number.

164465569 is a deficient number, since it is larger than the sum of its proper divisors (2253027).

164465569 is an equidigital number, since it uses as much as digits as its factorization.

164465569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253026.

The product of its digits is 777600, while the sum is 46.

The square root of 164465569 is about 12824.4130080094. The cubic root of 164465569 is about 547.8878428983.

The spelling of 164465569 in words is "one hundred sixty-four million, four hundred sixty-five thousand, five hundred sixty-nine".