16446000644 has 12 divisors (see below), whose sum is σ = 28782179664. Its totient is φ = 8222520744.

The previous prime is 16446000643. The next prime is 16446000667. The reversal of 16446000644 is 44600064461.

It is not an unprimeable number, because it can be changed into a prime (16446000643) 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, 36254 + ... + 184949.

It is an arithmetic number, because the mean of its divisors is an integer number (2398514972).

Almost surely, 2^16446000644 is an apocalyptic number.

It is an amenable number.

16446000644 is a deficient number, since it is larger than the sum of its proper divisors (12336179020).

16446000644 is a wasteful number, since it uses less digits than its factorization.

16446000644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239794 (or 239792 counting only the distinct ones).

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

The spelling of 16446000644 in words is "sixteen billion, four hundred forty-six million, six hundred forty-four", and thus it is an aban number.