16326947840 has 264 divisors, whose sum is σ = 46048263936. Its totient is φ = 5441126400.

The previous prime is 16326947839. The next prime is 16326947869. The reversal of 16326947840 is 4874962361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60246905 + ... + 60247175.

Almost surely, 2^16326947840 is an apocalyptic number.

16326947840 is a gapful number since it is divisible by the number (10) 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 16326947840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23024131968).

16326947840 is an abundant number, since it is smaller than the sum of its proper divisors (29721316096).

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

16326947840 is an equidigital number, since it uses as much as digits as its factorization.

16326947840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 16326947840 in words is "sixteen billion, three hundred twenty-six million, nine hundred forty-seven thousand, eight hundred forty".