13328009808 has 80 divisors (see below), whose sum is σ = 35046899712. Its totient is φ = 4363632000.

The previous prime is 13328009777. The next prime is 13328009833. The reversal of 13328009808 is 80890082331.

It is a Cunningham number, because it is equal to 115447²-1.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13328009808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916353 + ... + 930783.

Almost surely, 2^13328009808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13328009808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17523449856).

13328009808 is an abundant number, since it is smaller than the sum of its proper divisors (21718889904).

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

13328009808 is a wasteful number, since it uses less digits than its factorization.

13328009808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14784 (or 14778 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 13328009808 in words is "thirteen billion, three hundred twenty-eight million, nine thousand, eight hundred eight".