16728761920 has 224 divisors, whose sum is σ = 43935091200. Its totient is φ = 6029697024.

The previous prime is 16728761897. The next prime is 16728761941. The reversal of 16728761920 is 2916782761.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35821527 + ... + 35821993.

It is an arithmetic number, because the mean of its divisors is an integer number (196138800).

Almost surely, 2^16728761920 is an apocalyptic number.

16728761920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16728761920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21967545600).

16728761920 is an abundant number, since it is smaller than the sum of its proper divisors (27206329280).

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

16728761920 is a wasteful number, since it uses less digits than its factorization.

16728761920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 16728761920 in words is "sixteen billion, seven hundred twenty-eight million, seven hundred sixty-one thousand, nine hundred twenty".