16644516 has 36 divisors (see below), whose sum is σ = 45179568. Its totient is φ = 4755408.

The previous prime is 16644469. The next prime is 16644527. The reversal of 16644516 is 61544661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13566 + ... + 14741.

It is an arithmetic number, because the mean of its divisors is an integer number (1254988).

Almost surely, 2^16644516 is an apocalyptic number.

It is an amenable number.

16644516 is an abundant number, since it is smaller than the sum of its proper divisors (28535052).

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

16644516 is a wasteful number, since it uses less digits than its factorization.

16644516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28328 (or 28319 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 16644516 is about 4079.7691111140. The cubic root of 16644516 is about 255.3232655300.

The spelling of 16644516 in words is "sixteen million, six hundred forty-four thousand, five hundred sixteen".