16644464 has 20 divisors (see below), whose sum is σ = 32311920. Its totient is φ = 8305920.

The previous prime is 16644449. The next prime is 16644469. The reversal of 16644464 is 46444661.

Its product of digits (55296) is a multiple of the sum of its prime factors (2048).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644469) 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, 15629 + ... + 16659.

It is an arithmetic number, because the mean of its divisors is an integer number (1615596).

Almost surely, 2^16644464 is an apocalyptic number.

It is an amenable number.

16644464 is a deficient number, since it is larger than the sum of its proper divisors (15667456).

16644464 is a wasteful number, since it uses less digits than its factorization.

16644464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2042 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 16644464 is about 4079.7627381994. The cubic root of 16644464 is about 255.3229996401.

The spelling of 16644464 in words is "sixteen million, six hundred forty-four thousand, four hundred sixty-four".