16561146 has 32 divisors (see below), whose sum is σ = 39162240. Its totient is φ = 4568256.

The previous prime is 16561093. The next prime is 16561147. The reversal of 16561146 is 64116561.

It is not an unprimeable number, because it can be changed into a prime (16561147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5581 + ... + 8016.

It is an arithmetic number, because the mean of its divisors is an integer number (1223820).

Almost surely, 2^16561146 is an apocalyptic number.

16561146 is an abundant number, since it is smaller than the sum of its proper divisors (22601094).

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

16561146 is a wasteful number, since it uses less digits than its factorization.

16561146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13638.

The product of its digits is 4320, while the sum is 30.

The square root of 16561146 is about 4069.5387945073. The cubic root of 16561146 is about 254.8962592237.

The spelling of 16561146 in words is "sixteen million, five hundred sixty-one thousand, one hundred forty-six".