12391115056 has 10 divisors (see below), whose sum is σ = 24007785452. Its totient is φ = 6195557520.

The previous prime is 12391115029. The next prime is 12391115089. The reversal of 12391115056 is 65051119321.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387222330 + ... + 387222361.

Almost surely, 2^12391115056 is an apocalyptic number.

12391115056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12391115056 is a deficient number, since it is larger than the sum of its proper divisors (11616670396).

12391115056 is an equidigital number, since it uses as much as digits as its factorization.

12391115056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774444699 (or 774444693 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The spelling of 12391115056 in words is "twelve billion, three hundred ninety-one million, one hundred fifteen thousand, fifty-six".