16783720704 has 81 divisors (see below), whose sum is σ = 48409540543. Its totient is φ = 5592500736.

The previous prime is 16783720673. The next prime is 16783720711. The reversal of 16783720704 is 40702738761.

The square root of 16783720704 is 129552.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16783720704.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6217147 + ... + 6219845.

Almost surely, 2^16783720704 is an apocalyptic number.

16783720704 is the 129552-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16783720704

16783720704 is an abundant number, since it is smaller than the sum of its proper divisors (31625819839).

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

16783720704 is an frugal number, since it uses more digits than its factorization.

16783720704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420 (or 2704 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 16783720704 in words is "sixteen billion, seven hundred eighty-three million, seven hundred twenty thousand, seven hundred four".