164845845 has 12 divisors (see below), whose sum is σ = 285732876. Its totient is φ = 87917760.

The previous prime is 164845801. The next prime is 164845859. The reversal of 164845845 is 548548461.

It is a happy number.

164845845 is a `hidden beast` number, since 1 + 64 + 8 + 4 + 584 + 5 = 666.

164845845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117483921 + 47361924 = 10839^2 + 6882^2 .

It is not a de Polignac number, because 164845845 - 2⁶ = 164845781 is a prime.

It is a super-2 number, since 2×164845845² = 54348305227528050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3663241 = 164845845 / (1 + 6 + 4 + 8 + 4 + 5 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 164845845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1831576 + ... + 1831665.

It is an arithmetic number, because the mean of its divisors is an integer number (23811073).

Almost surely, 2^164845845 is an apocalyptic number.

164845845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164845845 is a deficient number, since it is larger than the sum of its proper divisors (120887031).

164845845 is a wasteful number, since it uses less digits than its factorization.

164845845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663252 (or 3663249 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The square root of 164845845 is about 12839.2307012531. The cubic root of 164845845 is about 548.3097918487.

The spelling of 164845845 in words is "one hundred sixty-four million, eight hundred forty-five thousand, eight hundred forty-five".