12631947541 has 6 divisors (see below), whose sum is σ = 12698466326. Its totient is φ = 12565775400.

The previous prime is 12631947539. The next prime is 12631947569. The reversal of 12631947541 is 14574913621.

It is a happy number.

12631947541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11811125041 + 820822500 = 108679^2 + 28650^2 .

It is not a de Polignac number, because 12631947541 - 2¹ = 12631947539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12631947241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136650 + ... + 209611.

Almost surely, 2^12631947541 is an apocalyptic number.

It is an amenable number.

12631947541 is a deficient number, since it is larger than the sum of its proper divisors (66518785).

12631947541 is an frugal number, since it uses more digits than its factorization.

12631947541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346643 (or 346452 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The spelling of 12631947541 in words is "twelve billion, six hundred thirty-one million, nine hundred forty-seven thousand, five hundred forty-one".