12181622756 has 24 divisors (see below), whose sum is σ = 22250014080. Its totient is φ = 5824602432.

The previous prime is 12181622749. The next prime is 12181622759. The reversal of 12181622756 is 65722618121.

It is not an unprimeable number, because it can be changed into a prime (12181622759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443825 + ... + 470471.

It is an arithmetic number, because the mean of its divisors is an integer number (927083920).

Almost surely, 2^12181622756 is an apocalyptic number.

It is an amenable number.

12181622756 is a deficient number, since it is larger than the sum of its proper divisors (10068391324).

12181622756 is a wasteful number, since it uses less digits than its factorization.

12181622756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31643 (or 31641 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The spelling of 12181622756 in words is "twelve billion, one hundred eighty-one million, six hundred twenty-two thousand, seven hundred fifty-six".