11985791756 has 24 divisors (see below), whose sum is σ = 21754278000. Its totient is φ = 5771347904.

The previous prime is 11985791737. The next prime is 11985791771. The reversal of 11985791756 is 65719758911.

It is a junction number, because it is equal to n+sod(n) for n = 11985791695 and 11985791704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87686 + ... + 177933.

It is an arithmetic number, because the mean of its divisors is an integer number (906428250).

Almost surely, 2^11985791756 is an apocalyptic number.

It is an amenable number.

11985791756 is a deficient number, since it is larger than the sum of its proper divisors (9768486244).

11985791756 is a wasteful number, since it uses less digits than its factorization.

11985791756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266041 (or 266039 counting only the distinct ones).

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

The spelling of 11985791756 in words is "eleven billion, nine hundred eighty-five million, seven hundred ninety-one thousand, seven hundred fifty-six".