11491043850 has 144 divisors (see below), whose sum is σ = 36270116064. Its totient is φ = 2571408000.

The previous prime is 11491043849. The next prime is 11491043867. The reversal of 11491043850 is 5834019411.

11491043850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 24936 + ... + 153635.

It is an arithmetic number, because the mean of its divisors is an integer number (251875806).

Almost surely, 2^11491043850 is an apocalyptic number.

11491043850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11491043850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18135058032).

11491043850 is an abundant number, since it is smaller than the sum of its proper divisors (24779072214).

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

11491043850 is a wasteful number, since it uses less digits than its factorization.

11491043850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178613 (or 178605 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 11491043850 in words is "eleven billion, four hundred ninety-one million, forty-three thousand, eight hundred fifty".