165256064 has 16 divisors (see below), whose sum is σ = 329221320. Its totient is φ = 82627968.

The previous prime is 165256051. The next prime is 165256073. The reversal of 165256064 is 460652561.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 645404 + ... + 645659.

Almost surely, 2^165256064 is an apocalyptic number.

It is an amenable number.

165256064 is a deficient number, since it is larger than the sum of its proper divisors (163965256).

165256064 is an equidigital number, since it uses as much as digits as its factorization.

165256064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291077 (or 1291065 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 165256064 is about 12855.1959922827. The cubic root of 165256064 is about 548.7642381930.

The spelling of 165256064 in words is "one hundred sixty-five million, two hundred fifty-six thousand, sixty-four".