11131235808 has 96 divisors (see below), whose sum is σ = 36429523200. Its totient is φ = 2891228160.

The previous prime is 11131235771. The next prime is 11131235849. The reversal of 11131235808 is 80853213111.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×11131235808² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 745533 + ... + 760316.

It is an arithmetic number, because the mean of its divisors is an integer number (379474200).

Almost surely, 2^11131235808 is an apocalyptic number.

It is an amenable number.

11131235808 is an abundant number, since it is smaller than the sum of its proper divisors (25298287392).

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

11131235808 is a wasteful number, since it uses less digits than its factorization.

11131235808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505880 (or 1505872 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

Adding to 11131235808 its reverse (80853213111), we get a palindrome (91984448919).

The spelling of 11131235808 in words is "eleven billion, one hundred thirty-one million, two hundred thirty-five thousand, eight hundred eight".