164852865 has 24 divisors (see below), whose sum is σ = 286783848. Its totient is φ = 87601920.

The previous prime is 164852833. The next prime is 164852899. The reversal of 164852865 is 568258461.

164852865 is a `hidden beast` number, since 1 + 64 + 8 + 528 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 38155329 + 126697536 = 6177^2 + 11256^2 .

It is not a de Polignac number, because 164852865 - 2⁵ = 164852833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 164852865.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 6127 + ... + 19163.

It is an arithmetic number, because the mean of its divisors is an integer number (11949327).

Almost surely, 2^164852865 is an apocalyptic number.

164852865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164852865 is a deficient number, since it is larger than the sum of its proper divisors (121930983).

164852865 is a wasteful number, since it uses less digits than its factorization.

164852865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13329 (or 13326 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 164852865 is about 12839.5040792080. The cubic root of 164852865 is about 548.3175750397.

The spelling of 164852865 in words is "one hundred sixty-four million, eight hundred fifty-two thousand, eight hundred sixty-five".