16644430786 has 16 divisors (see below), whose sum is σ = 25080650784. Its totient is φ = 8284296064.

The previous prime is 16644430757. The next prime is 16644430811. The reversal of 16644430786 is 68703444661.

16644430786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×16644430786³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 394341 + ... + 434503.

It is an arithmetic number, because the mean of its divisors is an integer number (1567540674).

Almost surely, 2^16644430786 is an apocalyptic number.

16644430786 is a deficient number, since it is larger than the sum of its proper divisors (8436219998).

16644430786 is a wasteful number, since it uses less digits than its factorization.

16644430786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41105.

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 16644430786 in words is "sixteen billion, six hundred forty-four million, four hundred thirty thousand, seven hundred eighty-six".