16016816800 has 36 divisors (see below), whose sum is σ = 39101055966. Its totient is φ = 6406726400.

The previous prime is 16016816759. The next prime is 16016816807. The reversal of 16016816800 is 861861061.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13194657424 + 2822159376 = 114868^2 + 53124^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16016816800.

It is not an unprimeable number, because it can be changed into a prime (16016816807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10009711 + ... + 10011310.

Almost surely, 2^16016816800 is an apocalyptic number.

16016816800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16016816800 is an abundant number, since it is smaller than the sum of its proper divisors (23084239166).

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

16016816800 is a wasteful number, since it uses less digits than its factorization.

16016816800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021041 (or 20021028 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 16016816800 in words is "sixteen billion, sixteen million, eight hundred sixteen thousand, eight hundred".