164500145 has 4 divisors (see below), whose sum is σ = 197400180. Its totient is φ = 131600112.

The previous prime is 164500139. The next prime is 164500153. The reversal of 164500145 is 541005461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541005461 = 359 ⋅1506979.

It can be written as a sum of positive squares in 2 ways, for example, as 37442161 + 127057984 = 6119^2 + 11272^2 .

It is a cyclic number.

It is not a de Polignac number, because 164500145 - 2¹² = 164496049 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 16450010 + ... + 16450019.

It is an arithmetic number, because the mean of its divisors is an integer number (49350045).

Almost surely, 2^164500145 is an apocalyptic number.

It is an amenable number.

164500145 is a deficient number, since it is larger than the sum of its proper divisors (32900035).

164500145 is an equidigital number, since it uses as much as digits as its factorization.

164500145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32900034.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 164500145 is about 12825.7609910679. The cubic root of 164500145 is about 547.9262348097.

The spelling of 164500145 in words is "one hundred sixty-four million, five hundred thousand, one hundred forty-five".