12638590026 has 16 divisors (see below), whose sum is σ = 25318422624. Its totient is φ = 4205989584.

The previous prime is 12638589991. The next prime is 12638590033. The reversal of 12638590026 is 62009583621.

It is a self number, because there is not a number n which added to its sum of digits gives 12638590026.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1714456 + ... + 1721811.

It is an arithmetic number, because the mean of its divisors is an integer number (1582401414).

Almost surely, 2^12638590026 is an apocalyptic number.

12638590026 is an abundant number, since it is smaller than the sum of its proper divisors (12679832598).

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

12638590026 is a wasteful number, since it uses less digits than its factorization.

12638590026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436885.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 12638590026 in words is "twelve billion, six hundred thirty-eight million, five hundred ninety thousand, twenty-six".