12782257226 has 8 divisors (see below), whose sum is σ = 19233870660. Its totient is φ = 6370967008.

The previous prime is 12782257171. The next prime is 12782257231. The reversal of 12782257226 is 62275228721.

12782257226 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 2 ways, for example, as 12177343201 + 604914025 = 110351^2 + 24595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 in 3 ways as a sum of consecutive naturals, for example, 10080011 + ... + 10081278.

Almost surely, 2^12782257226 is an apocalyptic number.

12782257226 is a deficient number, since it is larger than the sum of its proper divisors (6451613434).

12782257226 is a wasteful number, since it uses less digits than its factorization.

12782257226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20161608.

The product of its digits is 376320, while the sum is 44.

The spelling of 12782257226 in words is "twelve billion, seven hundred eighty-two million, two hundred fifty-seven thousand, two hundred twenty-six".