16780929728 has 56 divisors (see below), whose sum is σ = 33765134400. Its totient is φ = 8273461248.

The previous prime is 16780929727. The next prime is 16780929731. The reversal of 16780929728 is 82792908761.

It is not an unprimeable number, because it can be changed into a prime (16780929727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5039168 + ... + 5042496.

Almost surely, 2^16780929728 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 16780929728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16882567200).

16780929728 is an abundant number, since it is smaller than the sum of its proper divisors (16984204672).

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

16780929728 is an equidigital number, since it uses as much as digits as its factorization.

16780929728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 16780929728 in words is "sixteen billion, seven hundred eighty million, nine hundred twenty-nine thousand, seven hundred twenty-eight".