12639026499 has 64 divisors (see below), whose sum is σ = 20990430720. Its totient is φ = 6663168000.

The previous prime is 12639026497. The next prime is 12639026503. The reversal of 12639026499 is 99462093621.

12639026499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12639026499 - 2¹ = 12639026497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (12639026497) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 422559 + ... + 451479.

It is an arithmetic number, because the mean of its divisors is an integer number (327975480).

Almost surely, 2^12639026499 is an apocalyptic number.

12639026499 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12639026499 is a deficient number, since it is larger than the sum of its proper divisors (8351404221).

12639026499 is a wasteful number, since it uses less digits than its factorization.

12639026499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29012.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 12639026499 in words is "twelve billion, six hundred thirty-nine million, twenty-six thousand, four hundred ninety-nine".