13311581608 has 32 divisors (see below), whose sum is σ = 27050393160. Its totient is φ = 6104666880.

The previous prime is 13311581599. The next prime is 13311581611. The reversal of 13311581608 is 80618511331.

It can be written as a sum of positive squares in 4 ways, for example, as 4766797764 + 8544783844 = 69042^2 + 92438^2 .

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, 391303 + ... + 423958.

Almost surely, 2^13311581608 is an apocalyptic number.

It is an amenable number.

13311581608 is an abundant number, since it is smaller than the sum of its proper divisors (13738811552).

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

13311581608 is a wasteful number, since it uses less digits than its factorization.

13311581608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815437 (or 815433 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 13311581608 in words is "thirteen billion, three hundred eleven million, five hundred eighty-one thousand, six hundred eight".