12806783725 has 12 divisors (see below), whose sum is σ = 15882352884. Its totient is φ = 10244174720.

The previous prime is 12806783719. The next prime is 12806783741. The reversal of 12806783725 is 52738760821.

It can be written as a sum of positive squares in 6 ways, for example, as 49758916 + 12757024809 = 7054^2 + 112947^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12806783725 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215457 + ... + 268393.

It is an arithmetic number, because the mean of its divisors is an integer number (1323529407).

Almost surely, 2^12806783725 is an apocalyptic number.

It is an amenable number.

12806783725 is a deficient number, since it is larger than the sum of its proper divisors (3075569159).

12806783725 is an equidigital number, since it uses as much as digits as its factorization.

12806783725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62624 (or 62619 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 12806783725 in words is "twelve billion, eight hundred six million, seven hundred eighty-three thousand, seven hundred twenty-five".