16161856 has 28 divisors (see below), whose sum is σ = 33761680. Its totient is φ = 7655040.

The previous prime is 16161853. The next prime is 16161869. The reversal of 16161856 is 65816161.

It is a super-2 number, since 2×16161856² = 522411178729472, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (16161853) by changing a digit.

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, 5430 + ... + 7861.

Almost surely, 2^16161856 is an apocalyptic number.

16161856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16161856 is an abundant number, since it is smaller than the sum of its proper divisors (17599824).

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

16161856 is a wasteful number, since it uses less digits than its factorization.

16161856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13322 (or 13312 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 16161856 is about 4020.1810904485. The cubic root of 16161856 is about 252.8310515722.

The spelling of 16161856 in words is "sixteen million, one hundred sixty-one thousand, eight hundred fifty-six".