12638194445 has 32 divisors (see below), whose sum is σ = 16231622400. Its totient is φ = 9423208960.

The previous prime is 12638194433. The next prime is 12638194487. The reversal of 12638194445 is 54449183621.

12638194445 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 12638194445 - 2⁸ = 12638194189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12638194445.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6020006 + ... + 6022104.

It is an arithmetic number, because the mean of its divisors is an integer number (507238200).

Almost surely, 2^12638194445 is an apocalyptic number.

It is an amenable number.

12638194445 is a deficient number, since it is larger than the sum of its proper divisors (3593427955).

12638194445 is a wasteful number, since it uses less digits than its factorization.

12638194445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445.

The product of its digits is 829440, while the sum is 47.

The spelling of 12638194445 in words is "twelve billion, six hundred thirty-eight million, one hundred ninety-four thousand, four hundred forty-five".