164947845 has 16 divisors (see below), whose sum is σ = 264160512. Its totient is φ = 87890880.

The previous prime is 164947823. The next prime is 164947877. The reversal of 164947845 is 548749461.

It is not a de Polignac number, because 164947845 - 2⁶ = 164947781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164947794 and 164947803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13999 + ... + 22931.

It is an arithmetic number, because the mean of its divisors is an integer number (16510032).

Almost surely, 2^164947845 is an apocalyptic number.

164947845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164947845 is a deficient number, since it is larger than the sum of its proper divisors (99212667).

164947845 is a wasteful number, since it uses less digits than its factorization.

164947845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10172.

The product of its digits is 967680, while the sum is 48.

The square root of 164947845 is about 12843.2022875917. The cubic root of 164947845 is about 548.4228592369.

It can be divided in two parts, 1649 and 47845, that added together give a palindrome (49494).

The spelling of 164947845 in words is "one hundred sixty-four million, nine hundred forty-seven thousand, eight hundred forty-five".