16686888816 has 160 divisors (see below), whose sum is σ = 48736880640. Its totient is φ = 4884249600.

The previous prime is 16686888797. The next prime is 16686888859. The reversal of 16686888816 is 61888868661.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 1133986 + ... + 1148606.

It is an arithmetic number, because the mean of its divisors is an integer number (304605504).

Almost surely, 2^16686888816 is an apocalyptic number.

16686888816 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 16686888816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24368440320).

16686888816 is an abundant number, since it is smaller than the sum of its proper divisors (32049991824).

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

16686888816 is a wasteful number, since it uses less digits than its factorization.

16686888816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14735 (or 14729 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 66.

The spelling of 16686888816 in words is "sixteen billion, six hundred eighty-six million, eight hundred eighty-eight thousand, eight hundred sixteen".