11128568720 has 40 divisors (see below), whose sum is σ = 25903588344. Its totient is φ = 4446323712.

The previous prime is 11128568707. The next prime is 11128568729. The reversal of 11128568720 is 2786582111.

It can be written as a sum of positive squares in 4 ways, for example, as 3626930176 + 7501638544 = 60224^2 + 86612^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (11128568729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9149 + ... + 149468.

Almost surely, 2^11128568720 is an apocalyptic number.

11128568720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11128568720 is an abundant number, since it is smaller than the sum of its proper divisors (14775019624).

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

11128568720 is a wasteful number, since it uses less digits than its factorization.

11128568720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159507 (or 159501 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 11128568720 in words is "eleven billion, one hundred twenty-eight million, five hundred sixty-eight thousand, seven hundred twenty".