16449796768 has 72 divisors (see below), whose sum is σ = 34494673500. Its totient is φ = 7720378368.

The previous prime is 16449796757. The next prime is 16449796771. The reversal of 16449796768 is 86769794461.

It can be written as a sum of positive squares in 6 ways, for example, as 11753161744 + 4696635024 = 108412^2 + 68532^2 .

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, 3780258 + ... + 3784606.

Almost surely, 2^16449796768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16449796768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17247336750).

16449796768 is an abundant number, since it is smaller than the sum of its proper divisors (18044876732).

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

16449796768 is a wasteful number, since it uses less digits than its factorization.

16449796768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802 (or 4777 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 67.

The spelling of 16449796768 in words is "sixteen billion, four hundred forty-nine million, seven hundred ninety-six thousand, seven hundred sixty-eight".