11111000080 has 80 divisors (see below), whose sum is σ = 28541994624. Its totient is φ = 4001085440.

The previous prime is 11111000071. The next prime is 11111000081. The reversal of 11111000080 is 8000011111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 11111000080.

It is not an unprimeable number, because it can be changed into a prime (11111000081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146326 + ... + 208885.

Almost surely, 2^11111000080 is an apocalyptic number.

11111000080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111000080 is an abundant number, since it is smaller than the sum of its proper divisors (17430994544).

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

11111000080 is a wasteful number, since it uses less digits than its factorization.

11111000080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355264 (or 355258 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111000080 its reverse (8000011111), we get a palindrome (19111011191).

The spelling of 11111000080 in words is "eleven billion, one hundred eleven million, eighty", and thus it is an aban number.