12641947747 has 24 divisors (see below), whose sum is σ = 15001091280. Its totient is φ = 10582756800.

The previous prime is 12641947739. The next prime is 12641947751. The reversal of 12641947747 is 74774914621.

It is not a de Polignac number, because 12641947747 - 2³ = 12641947739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12641947694 and 12641947703.

It is not an unprimeable number, because it can be changed into a prime (12641947727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 649497 + ... + 668677.

It is an arithmetic number, because the mean of its divisors is an integer number (625045470).

Almost surely, 2^12641947747 is an apocalyptic number.

12641947747 is a deficient number, since it is larger than the sum of its proper divisors (2359143533).

12641947747 is a wasteful number, since it uses less digits than its factorization.

12641947747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19635 (or 19624 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The spelling of 12641947747 in words is "twelve billion, six hundred forty-one million, nine hundred forty-seven thousand, seven hundred forty-seven".