16561882 has 8 divisors (see below), whose sum is σ = 26150400. Its totient is φ = 7845084.

The previous prime is 16561861. The next prime is 16561889. The reversal of 16561882 is 28816561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (16561889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217882 + ... + 217957.

It is an arithmetic number, because the mean of its divisors is an integer number (3268800).

Almost surely, 2^16561882 is an apocalyptic number.

16561882 is a deficient number, since it is larger than the sum of its proper divisors (9588518).

16561882 is a wasteful number, since it uses less digits than its factorization.

16561882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435860.

The product of its digits is 23040, while the sum is 37.

The square root of 16561882 is about 4069.6292214402. The cubic root of 16561882 is about 254.9000351474.

The spelling of 16561882 in words is "sixteen million, five hundred sixty-one thousand, eight hundred eighty-two".