12638632801 has 4 divisors (see below), whose sum is σ = 12639128112. Its totient is φ = 12638137492.

The previous prime is 12638632793. The next prime is 12638632829. The reversal of 12638632801 is 10823683621.

12638632801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12638632801 - 2³ = 12638632793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12638632841) 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 3 ways as a sum of consecutive naturals, for example, 207175 + ... + 261148.

It is an arithmetic number, because the mean of its divisors is an integer number (3159782028).

Almost surely, 2^12638632801 is an apocalyptic number.

It is an amenable number.

12638632801 is a deficient number, since it is larger than the sum of its proper divisors (495311).

12638632801 is an equidigital number, since it uses as much as digits as its factorization.

12638632801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495310.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 12638632801 in words is "twelve billion, six hundred thirty-eight million, six hundred thirty-two thousand, eight hundred one".