16944447225 has 12 divisors (see below), whose sum is σ = 28014819536. Its totient is φ = 9037038480.

The previous prime is 16944447211. The next prime is 16944447227. The reversal of 16944447225 is 52274444961.

It is not a de Polignac number, because 16944447225 - 2⁶ = 16944447161 is a prime.

It is a super-2 number, since 2×16944447225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16944447227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112962907 + ... + 112963056.

Almost surely, 2^16944447225 is an apocalyptic number.

16944447225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16944447225 is a deficient number, since it is larger than the sum of its proper divisors (11070372311).

16944447225 is a wasteful number, since it uses less digits than its factorization.

16944447225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225925976 (or 225925971 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 48.

The spelling of 16944447225 in words is "sixteen billion, nine hundred forty-four million, four hundred forty-seven thousand, two hundred twenty-five".