12826556799 has 16 divisors (see below), whose sum is σ = 19547582208. Its totient is φ = 7328578752.

The previous prime is 12826556783. The next prime is 12826556801. The reversal of 12826556799 is 99765562821.

It is not a de Polignac number, because 12826556799 - 2⁴ = 12826556783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12826556299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168499 + ... + 232475.

It is an arithmetic number, because the mean of its divisors is an integer number (1221723888).

Almost surely, 2^12826556799 is an apocalyptic number.

12826556799 is a deficient number, since it is larger than the sum of its proper divisors (6721025409).

12826556799 is an equidigital number, since it uses as much as digits as its factorization.

12826556799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73534.

The product of its digits is 16329600, while the sum is 60.

It can be divided in two parts, 12 and 826556799, that added together give a triangular number (826556811 = T₄₀₆₅₈).

The spelling of 12826556799 in words is "twelve billion, eight hundred twenty-six million, five hundred fifty-six thousand, seven hundred ninety-nine".