16044681 has 4 divisors (see below), whose sum is σ = 21392912. Its totient is φ = 10696452.

The previous prime is 16044659. The next prime is 16044689. The reversal of 16044681 is 18644061.

16044681 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18644061 = 3 ⋅6214687.

It is not a de Polignac number, because 16044681 - 2⁵ = 16044649 is a prime.

It is a super-2 number, since 2×16044681² = 514863576783522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16044689) 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, 2674111 + ... + 2674116.

It is an arithmetic number, because the mean of its divisors is an integer number (5348228).

Almost surely, 2^16044681 is an apocalyptic number.

It is an amenable number.

16044681 is a deficient number, since it is larger than the sum of its proper divisors (5348231).

16044681 is an equidigital number, since it uses as much as digits as its factorization.

16044681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348230.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 16044681 is about 4005.5812312322. The cubic root of 16044681 is about 252.2185525272.

The spelling of 16044681 in words is "sixteen million, forty-four thousand, six hundred eighty-one".