11001131808 has 48 divisors (see below), whose sum is σ = 29582322336. Its totient is φ = 3577602560.

The previous prime is 11001131777. The next prime is 11001131821. The reversal of 11001131808 is 80813110011.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393566 + ... + 1401437.

It is an arithmetic number, because the mean of its divisors is an integer number (616298382).

Almost surely, 2^11001131808 is an apocalyptic number.

It is an amenable number.

11001131808 is an abundant number, since it is smaller than the sum of its proper divisors (18581190528).

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

11001131808 is a wasteful number, since it uses less digits than its factorization.

11001131808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795057 (or 2795049 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 24.

Adding to 11001131808 its reverse (80813110011), we get a palindrome (91814241819).

The spelling of 11001131808 in words is "eleven billion, one million, one hundred thirty-one thousand, eight hundred eight".