12491520768 has 54 divisors (see below), whose sum is σ = 36016140524. Its totient is φ = 4163839488.

The previous prime is 12491520757. The next prime is 12491520781. The reversal of 12491520768 is 86702519421.

12491520768 is a `hidden beast` number, since 12 + 49 + 1 + 520 + 76 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2708530 + ... + 2713137.

Almost surely, 2^12491520768 is an apocalyptic number.

12491520768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12491520768 is an abundant number, since it is smaller than the sum of its proper divisors (23524619756).

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

12491520768 is an equidigital number, since it uses as much as digits as its factorization.

12491520768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421689 (or 5421672 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 12491520768 in words is "twelve billion, four hundred ninety-one million, five hundred twenty thousand, seven hundred sixty-eight".