12724776636 has 48 divisors (see below), whose sum is σ = 34881909888. Its totient is φ = 3559377600.

The previous prime is 12724776601. The next prime is 12724776637. The reversal of 12724776636 is 63667742721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12724776637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3705970 + ... + 3709401.

It is an arithmetic number, because the mean of its divisors is an integer number (726706456).

Almost surely, 2^12724776636 is an apocalyptic number.

It is an amenable number.

12724776636 is an abundant number, since it is smaller than the sum of its proper divisors (22157133252).

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

12724776636 is a wasteful number, since it uses less digits than its factorization.

12724776636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7415402 (or 7415400 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 51.

The spelling of 12724776636 in words is "twelve billion, seven hundred twenty-four million, seven hundred seventy-six thousand, six hundred thirty-six".