165250564 has 6 divisors (see below), whose sum is σ = 289188494. Its totient is φ = 82625280.

The previous prime is 165250549. The next prime is 165250571. The reversal of 165250564 is 465052561.

It can be written as a sum of positive squares in only one way, i.e., 161798400 + 3452164 = 12720^2 + 1858^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20656317 + ... + 20656324.

Almost surely, 2^165250564 is an apocalyptic number.

It is an amenable number.

165250564 is a deficient number, since it is larger than the sum of its proper divisors (123937930).

165250564 is a wasteful number, since it uses less digits than its factorization.

165250564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41312645 (or 41312643 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 165250564 is about 12854.9820692213. The cubic root of 165250564 is about 548.7581501930.

The spelling of 165250564 in words is "one hundred sixty-five million, two hundred fifty thousand, five hundred sixty-four".