164015945 has 4 divisors (see below), whose sum is σ = 196819140. Its totient is φ = 131212752.

The previous prime is 164015927. The next prime is 164015987. The reversal of 164015945 is 549510461.

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 24492601 + 139523344 = 4949^2 + 11812^2 .

It is a cyclic number.

It is not a de Polignac number, because 164015945 - 2¹⁸ = 163753801 is a prime.

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, 16401590 + ... + 16401599.

It is an arithmetic number, because the mean of its divisors is an integer number (49204785).

Almost surely, 2^164015945 is an apocalyptic number.

It is an amenable number.

164015945 is a deficient number, since it is larger than the sum of its proper divisors (32803195).

164015945 is an equidigital number, since it uses as much as digits as its factorization.

164015945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32803194.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 164015945 is about 12806.8710073929. The cubic root of 164015945 is about 547.3881063775.

The spelling of 164015945 in words is "one hundred sixty-four million, fifteen thousand, nine hundred forty-five".