12391043496 has 96 divisors (see below), whose sum is σ = 35309484000. Its totient is φ = 3611941632.

The previous prime is 12391043491. The next prime is 12391043507. The reversal of 12391043496 is 69434019321.

It is not an unprimeable number, because it can be changed into a prime (12391043491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3331 + ... + 157458.

It is an arithmetic number, because the mean of its divisors is an integer number (367807125).

Almost surely, 2^12391043496 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 12391043496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17654742000).

12391043496 is an abundant number, since it is smaller than the sum of its proper divisors (22918440504).

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

12391043496 is a wasteful number, since it uses less digits than its factorization.

12391043496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160843 (or 160826 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

It can be divided in two parts, 1239 and 1043496, that added together give a triangular number (1044735 = T₁₄₄₅).

The spelling of 12391043496 in words is "twelve billion, three hundred ninety-one million, forty-three thousand, four hundred ninety-six".