16856372204 has 72 divisors (see below), whose sum is σ = 36045289728. Its totient is φ = 6864026400.

The previous prime is 16856372191. The next prime is 16856372243. The reversal of 16856372204 is 40227365861.

It is a super-3 number, since 3×16856372204³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 668327 + ... + 693089.

It is an arithmetic number, because the mean of its divisors is an integer number (500629024).

Almost surely, 2^16856372204 is an apocalyptic number.

16856372204 is a gapful number since it is divisible by the number (14) 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 16856372204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18022644864).

16856372204 is an abundant number, since it is smaller than the sum of its proper divisors (19188917524).

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

16856372204 is a wasteful number, since it uses less digits than its factorization.

16856372204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24955 (or 24946 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 16856372204 in words is "sixteen billion, eight hundred fifty-six million, three hundred seventy-two thousand, two hundred four".