12806783722 has 4 divisors (see below), whose sum is σ = 19210175586. Its totient is φ = 6403391860.

The previous prime is 12806783719. The next prime is 12806783741. The reversal of 12806783722 is 22738760821.

12806783722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22738760821 = 7 ⋅3248394403.

It can be written as a sum of positive squares in only one way, i.e., 11605537441 + 1201246281 = 107729^2 + 34659^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3201695929 + ... + 3201695932.

Almost surely, 2^12806783722 is an apocalyptic number.

12806783722 is a deficient number, since it is larger than the sum of its proper divisors (6403391864).

12806783722 is an equidigital number, since it uses as much as digits as its factorization.

12806783722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403391863.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 12806783722 in words is "twelve billion, eight hundred six million, seven hundred eighty-three thousand, seven hundred twenty-two".