11785991756 has 96 divisors (see below), whose sum is σ = 26475724800. Its totient is φ = 4550649600.

The previous prime is 11785991743. The next prime is 11785991771. The reversal of 11785991756 is 65719958711.

It is a junction number, because it is equal to n+sod(n) for n = 11785991695 and 11785991704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1701941 + ... + 1708851.

It is an arithmetic number, because the mean of its divisors is an integer number (275788800).

Almost surely, 2^11785991756 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 11785991756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13237862400).

11785991756 is an abundant number, since it is smaller than the sum of its proper divisors (14689733044).

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

11785991756 is a wasteful number, since it uses less digits than its factorization.

11785991756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7060 (or 7044 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 59.

The spelling of 11785991756 in words is "eleven billion, seven hundred eighty-five million, nine hundred ninety-one thousand, seven hundred fifty-six".