16644880012 has 6 divisors (see below), whose sum is σ = 29128540028. Its totient is φ = 8322440004.

The previous prime is 16644879961. The next prime is 16644880037. The reversal of 16644880012 is 21008844661.

It is a super-2 number, since 2×16644880012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2080609998 + ... + 2080610005.

Almost surely, 2^16644880012 is an apocalyptic number.

It is an amenable number.

16644880012 is a deficient number, since it is larger than the sum of its proper divisors (12483660016).

16644880012 is a wasteful number, since it uses less digits than its factorization.

16644880012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161220007 (or 4161220005 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The spelling of 16644880012 in words is "sixteen billion, six hundred forty-four million, eight hundred eighty thousand, twelve".