16557056 has 88 divisors (see below), whose sum is σ = 37337280. Its totient is φ = 7299072.

The previous prime is 16557053. The next prime is 16557059. The reversal of 16557056 is 65075561.

It is an interprime number because it is at equal distance from previous prime (16557053) and next prime (16557059).

It is a super-2 number, since 2×16557056² = 548272206774272, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16557053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447470 + ... + 447506.

Almost surely, 2^16557056 is an apocalyptic number.

16557056 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 16557056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18668640).

16557056 is an abundant number, since it is smaller than the sum of its proper divisors (20780224).

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

16557056 is a wasteful number, since it uses less digits than its factorization.

16557056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 16557056 is about 4069.0362495313. The cubic root of 16557056 is about 254.8752741314.

The spelling of 16557056 in words is "sixteen million, five hundred fifty-seven thousand, fifty-six".