11811440736 has 288 divisors, whose sum is σ = 36414731808. Its totient is φ = 3762339840.

The previous prime is 11811440731. The next prime is 11811440803. The reversal of 11811440736 is 63704411811.

11811440736 is a `hidden beast` number, since 1 + 181 + 1 + 440 + 7 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11811440736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811440731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17550096 + ... + 17550768.

It is an arithmetic number, because the mean of its divisors is an integer number (126440041).

Almost surely, 2^11811440736 is an apocalyptic number.

11811440736 is a gapful number since it is divisible by the number (16) 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 11811440736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18207365904).

11811440736 is an abundant number, since it is smaller than the sum of its proper divisors (24603291072).

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

11811440736 is an equidigital number, since it uses as much as digits as its factorization.

11811440736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 11811440736 in words is "eleven billion, eight hundred eleven million, four hundred forty thousand, seven hundred thirty-six".