16320776448 has 144 divisors (see below), whose sum is σ = 45563212800. Its totient is φ = 5176461312.

The previous prime is 16320776443. The next prime is 16320776449. The reversal of 16320776448 is 84467702361.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 16320776397 and 16320776406.

It is not an unprimeable number, because it can be changed into a prime (16320776443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3512815 + ... + 3517457.

It is an arithmetic number, because the mean of its divisors is an integer number (316411200).

Almost surely, 2^16320776448 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 16320776448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22781606400).

16320776448 is an abundant number, since it is smaller than the sum of its proper divisors (29242436352).

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

16320776448 is a wasteful number, since it uses less digits than its factorization.

16320776448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884 (or 4870 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 16320776448 in words is "sixteen billion, three hundred twenty million, seven hundred seventy-six thousand, four hundred forty-eight".