164764745 has 4 divisors (see below), whose sum is σ = 197717700. Its totient is φ = 131811792.

The previous prime is 164764739. The next prime is 164764759. The reversal of 164764745 is 547467461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59845696 + 104919049 = 7736^2 + 10243^2 .

It is a cyclic number.

It is not a de Polignac number, because 164764745 - 2⁴ = 164764729 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 164764696 and 164764705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16476470 + ... + 16476479.

It is an arithmetic number, because the mean of its divisors is an integer number (49429425).

Almost surely, 2^164764745 is an apocalyptic number.

It is an amenable number.

164764745 is a deficient number, since it is larger than the sum of its proper divisors (32952955).

164764745 is an equidigital number, since it uses as much as digits as its factorization.

164764745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32952954.

The product of its digits is 564480, while the sum is 44.

The square root of 164764745 is about 12836.0720237929. The cubic root of 164764745 is about 548.2198589005.

The spelling of 164764745 in words is "one hundred sixty-four million, seven hundred sixty-four thousand, seven hundred forty-five".