201605164 has 6 divisors (see below), whose sum is σ = 352809044. Its totient is φ = 100802580.

The previous prime is 201605161. The next prime is 201605167. The reversal of 201605164 is 461506102.

It is an interprime number because it is at equal distance from previous prime (201605161) and next prime (201605167).

It is not an unprimeable number, because it can be changed into a prime (201605161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25200642 + ... + 25200649.

Almost surely, 2^201605164 is an apocalyptic number.

It is an amenable number.

201605164 is a deficient number, since it is larger than the sum of its proper divisors (151203880).

201605164 is a wasteful number, since it uses less digits than its factorization.

201605164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50401295 (or 50401293 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 201605164 is about 14198.7733272984. The cubic root of 201605164 is about 586.3638900517.

The spelling of 201605164 in words is "two hundred one million, six hundred five thousand, one hundred sixty-four".