12791212828 has 36 divisors (see below), whose sum is σ = 23834920032. Its totient is φ = 6005194240.

The previous prime is 12791212799. The next prime is 12791212849. The reversal of 12791212828 is 82821219721.

It is a super-2 number, since 2×12791212828² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 485400 + ... + 511072.

It is an arithmetic number, because the mean of its divisors is an integer number (662081112).

Almost surely, 2^12791212828 is an apocalyptic number.

It is an amenable number.

12791212828 is a deficient number, since it is larger than the sum of its proper divisors (11043707204).

12791212828 is a wasteful number, since it uses less digits than its factorization.

12791212828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26142 (or 26123 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The spelling of 12791212828 in words is "twelve billion, seven hundred ninety-one million, two hundred twelve thousand, eight hundred twenty-eight".