11573897808 has 120 divisors (see below), whose sum is σ = 32993763264. Its totient is φ = 3493445120.

The previous prime is 11573897807. The next prime is 11573897821. The reversal of 11573897808 is 80879837511.

11573897808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11573897808² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11573897807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1523716 + ... + 1531292.

Almost surely, 2^11573897808 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 11573897808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16496881632).

11573897808 is an abundant number, since it is smaller than the sum of its proper divisors (21419865456).

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

11573897808 is a wasteful number, since it uses less digits than its factorization.

11573897808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7873 (or 7856 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 57.

The spelling of 11573897808 in words is "eleven billion, five hundred seventy-three million, eight hundred ninety-seven thousand, eight hundred eight".