12822811578 has 24 divisors (see below), whose sum is σ = 29417039028. Its totient is φ = 4022842752.

The previous prime is 12822811553. The next prime is 12822811591. The reversal of 12822811578 is 87511822821.

It can be written as a sum of positive squares in 2 ways, for example, as 12770582049 + 52229529 = 113007^2 + 7227^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20952001 + ... + 20952612.

Almost surely, 2^12822811578 is an apocalyptic number.

12822811578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12822811578 is an abundant number, since it is smaller than the sum of its proper divisors (16594227450).

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

12822811578 is a wasteful number, since it uses less digits than its factorization.

12822811578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41904638 (or 41904635 counting only the distinct ones).

The product of its digits is 143360, while the sum is 45.

The spelling of 12822811578 in words is "twelve billion, eight hundred twenty-two million, eight hundred eleven thousand, five hundred seventy-eight".