12811672826 has 8 divisors (see below), whose sum is σ = 19218543060. Its totient is φ = 6405491808.

The previous prime is 12811672817. The next prime is 12811672859. The reversal of 12811672826 is 62827611821.

It can be written as a sum of positive squares in 2 ways, for example, as 11631406801 + 1180266025 = 107849^2 + 34355^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123011 + ... + 201878.

Almost surely, 2^12811672826 is an apocalyptic number.

12811672826 is a deficient number, since it is larger than the sum of its proper divisors (6406870234).

12811672826 is a wasteful number, since it uses less digits than its factorization.

12811672826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344608.

The product of its digits is 129024, while the sum is 44.

The spelling of 12811672826 in words is "twelve billion, eight hundred eleven million, six hundred seventy-two thousand, eight hundred twenty-six".