16720128888 has 32 divisors (see below), whose sum is σ = 42303945600. Its totient is φ = 5506226528.

The previous prime is 16720128871. The next prime is 16720128899. The reversal of 16720128888 is 88882102761.

It is a self number, because there is not a number n which added to its sum of digits gives 16720128888.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4194828 + ... + 4198811.

It is an arithmetic number, because the mean of its divisors is an integer number (1321998300).

Almost surely, 2^16720128888 is an apocalyptic number.

It is an amenable number.

16720128888 is an abundant number, since it is smaller than the sum of its proper divisors (25583816712).

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

16720128888 is a wasteful number, since it uses less digits than its factorization.

16720128888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8393731 (or 8393727 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 51.

The spelling of 16720128888 in words is "sixteen billion, seven hundred twenty million, one hundred twenty-eight thousand, eight hundred eighty-eight".