11809797120 has 528 divisors, whose sum is σ = 46627581312. Its totient is φ = 2735800320.

The previous prime is 11809797101. The next prime is 11809797151. The reversal of 11809797120 is 2179790811.

It is a happy number.

11809797120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (528).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 11657734 + ... + 11658746.

Almost surely, 2^11809797120 is an apocalyptic number.

11809797120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11809797120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23313790656).

11809797120 is an abundant number, since it is smaller than the sum of its proper divisors (34817784192).

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

11809797120 is a wasteful number, since it uses less digits than its factorization.

11809797120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

The spelling of 11809797120 in words is "eleven billion, eight hundred nine million, seven hundred ninety-seven thousand, one hundred twenty".