16944472778 has 16 divisors (see below), whose sum is σ = 25459799040. Its totient is φ = 8457886800.

The previous prime is 16944472777. The next prime is 16944472829. The reversal of 16944472778 is 87727444961.

It is not an unprimeable number, because it can be changed into a prime (16944472777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5431103 + ... + 5434221.

It is an arithmetic number, because the mean of its divisors is an integer number (1591237440).

Almost surely, 2^16944472778 is an apocalyptic number.

16944472778 is a deficient number, since it is larger than the sum of its proper divisors (8515326262).

16944472778 is a wasteful number, since it uses less digits than its factorization.

16944472778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6853.

The product of its digits is 18966528, while the sum is 59.

The spelling of 16944472778 in words is "sixteen billion, nine hundred forty-four million, four hundred seventy-two thousand, seven hundred seventy-eight".