16840664576 has 80 divisors (see below), whose sum is σ = 35688099744. Its totient is φ = 7911604224.

The previous prime is 16840664567. The next prime is 16840664591. The reversal of 16840664576 is 67546604861.

It is a super-2 number, since 2×16840664576² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6726941 + ... + 6729443.

Almost surely, 2^16840664576 is an apocalyptic number.

16840664576 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 16840664576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17844049872).

16840664576 is an abundant number, since it is smaller than the sum of its proper divisors (18847435168).

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

16840664576 is an equidigital number, since it uses as much as digits as its factorization.

16840664576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311 (or 3295 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 16840664576 in words is "sixteen billion, eight hundred forty million, six hundred sixty-four thousand, five hundred seventy-six".