11918057728 has 72 divisors (see below), whose sum is σ = 24257995776. Its totient is φ = 5842636800.

The previous prime is 11918057717. The next prime is 11918057737. The reversal of 11918057728 is 82775081911.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3469900 + ... + 3473332.

It is an arithmetic number, because the mean of its divisors is an integer number (336916608).

Almost surely, 2^11918057728 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 11918057728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12128997888).

11918057728 is an abundant number, since it is smaller than the sum of its proper divisors (12339938048).

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

11918057728 is an equidigital number, since it uses as much as digits as its factorization.

11918057728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 49.

The spelling of 11918057728 in words is "eleven billion, nine hundred eighteen million, fifty-seven thousand, seven hundred twenty-eight".