164565461 has 4 divisors (see below), whose sum is σ = 166194924. Its totient is φ = 162936000.

The previous prime is 164565451. The next prime is 164565473.

It is a happy number.

164565461 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105966436 + 58599025 = 10294^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 164565461 - 2⁶ = 164565397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164565421) 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, 814580 + ... + 814781.

It is an arithmetic number, because the mean of its divisors is an integer number (41548731).

Almost surely, 2^164565461 is an apocalyptic number.

It is an amenable number.

164565461 is a deficient number, since it is larger than the sum of its proper divisors (1629463).

164565461 is a wasteful number, since it uses less digits than its factorization.

164565461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629462.

The product of its digits is 86400, while the sum is 38.

The square root of 164565461 is about 12828.3070200241. The cubic root of 164565461 is about 547.9987446026.

The spelling of 164565461 in words is "one hundred sixty-four million, five hundred sixty-five thousand, four hundred sixty-one".