164157065 has 8 divisors (see below), whose sum is σ = 197062728. Its totient is φ = 131276160.

The previous prime is 164157061. The next prime is 164157067. The reversal of 164157065 is 560751461.

It can be written as a sum of positive squares in 4 ways, for example, as 61418569 + 102738496 = 7837^2 + 10136^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164157065 - 2² = 164157061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164157061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15005 + ... + 23525.

It is an arithmetic number, because the mean of its divisors is an integer number (24632841).

Almost surely, 2^164157065 is an apocalyptic number.

It is an amenable number.

164157065 is a deficient number, since it is larger than the sum of its proper divisors (32905663).

164157065 is an equidigital number, since it uses as much as digits as its factorization.

164157065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12379.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 164157065 is about 12812.3793652857. The cubic root of 164157065 is about 547.5450530400.

The spelling of 164157065 in words is "one hundred sixty-four million, one hundred fifty-seven thousand, sixty-five".