165556256 has 24 divisors (see below), whose sum is σ = 327317760. Its totient is φ = 82427968.

The previous prime is 165556219. The next prime is 165556267. The reversal of 165556256 is 652655561.

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 in 3 ways as a sum of consecutive naturals, for example, 3176 + ... + 18471.

It is an arithmetic number, because the mean of its divisors is an integer number (13638240).

Almost surely, 2^165556256 is an apocalyptic number.

165556256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165556256 is a deficient number, since it is larger than the sum of its proper divisors (161761504).

165556256 is a wasteful number, since it uses less digits than its factorization.

165556256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21896 (or 21888 counting only the distinct ones).

The product of its digits is 270000, while the sum is 41.

The square root of 165556256 is about 12866.8665960287. The cubic root of 165556256 is about 549.0963187684.

The spelling of 165556256 in words is "one hundred sixty-five million, five hundred fifty-six thousand, two hundred fifty-six".