11199909798 has 256 divisors, whose sum is σ = 31723591680. Its totient is φ = 2868687360.

The previous prime is 11199909779. The next prime is 11199909829. The reversal of 11199909798 is 89790999111.

11199909798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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 127 ways as a sum of consecutive naturals, for example, 56852236 + ... + 56852432.

It is an arithmetic number, because the mean of its divisors is an integer number (123920280).

Almost surely, 2^11199909798 is an apocalyptic number.

11199909798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11199909798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15861795840).

11199909798 is an abundant number, since it is smaller than the sum of its proper divisors (20523681882).

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

11199909798 is a wasteful number, since it uses less digits than its factorization.

11199909798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 63.

The spelling of 11199909798 in words is "eleven billion, one hundred ninety-nine million, nine hundred nine thousand, seven hundred ninety-eight".