164568745 has 32 divisors (see below), whose sum is σ = 220429440. Its totient is φ = 116951040.

The previous prime is 164568737. The next prime is 164568751. The reversal of 164568745 is 547865461.

It is not a de Polignac number, because 164568745 - 2³ = 164568737 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 164568695 and 164568704.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581374 + ... + 581656.

It is an arithmetic number, because the mean of its divisors is an integer number (6888420).

Almost surely, 2^164568745 is an apocalyptic number.

It is an amenable number.

164568745 is a deficient number, since it is larger than the sum of its proper divisors (55860695).

164568745 is a wasteful number, since it uses less digits than its factorization.

164568745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its digits is 806400, while the sum is 46.

The square root of 164568745 is about 12828.4350175694. The cubic root of 164568745 is about 548.0023897901.

The spelling of 164568745 in words is "one hundred sixty-four million, five hundred sixty-eight thousand, seven hundred forty-five".