16556803936 has 72 divisors (see below), whose sum is σ = 33499376064. Its totient is φ = 8055048960.

The previous prime is 16556803903. The next prime is 16556803961. The reversal of 16556803936 is 63930865561.

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 11 ways as a sum of consecutive naturals, for example, 27276145 + ... + 27276751.

It is an arithmetic number, because the mean of its divisors is an integer number (465269112).

Almost surely, 2^16556803936 is an apocalyptic number.

16556803936 is a gapful number since it is divisible by the number (16) 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 16556803936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16749688032).

16556803936 is an abundant number, since it is smaller than the sum of its proper divisors (16942572128).

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

16556803936 is an equidigital number, since it uses as much as digits as its factorization.

16556803936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 16556803936 in words is "sixteen billion, five hundred fifty-six million, eight hundred three thousand, nine hundred thirty-six".