165555056 has 40 divisors (see below), whose sum is σ = 344858880. Its totient is φ = 76745664.

The previous prime is 165555043. The next prime is 165555067. The reversal of 165555056 is 650555561.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8495 + ... + 20081.

It is an arithmetic number, because the mean of its divisors is an integer number (8621472).

Almost surely, 2^165555056 is an apocalyptic number.

165555056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165555056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172429440).

165555056 is an abundant number, since it is smaller than the sum of its proper divisors (179303824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165555056 is a wasteful number, since it uses less digits than its factorization.

165555056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11661 (or 11655 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 165555056 is about 12866.8199645445. The cubic root of 165555056 is about 549.0949920952.

The spelling of 165555056 in words is "one hundred sixty-five million, five hundred fifty-five thousand, fifty-six".