12637638889 has 8 divisors (see below), whose sum is σ = 12797453480. Its totient is φ = 12478427136.

The previous prime is 12637638863. The next prime is 12637638913. The reversal of 12637638889 is 98883673621.

It can be written as a sum of positive squares in 4 ways, for example, as 24552025 + 12613086864 = 4955^2 + 112308^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12637638889 - 2¹¹ = 12637636841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12637638089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108444 + ... + 192445.

It is an arithmetic number, because the mean of its divisors is an integer number (1599681685).

Almost surely, 2^12637638889 is an apocalyptic number.

It is an amenable number.

12637638889 is a deficient number, since it is larger than the sum of its proper divisors (159814591).

12637638889 is an equidigital number, since it uses as much as digits as its factorization.

12637638889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301419.

The product of its digits is 20901888, while the sum is 61.

The spelling of 12637638889 in words is "twelve billion, six hundred thirty-seven million, six hundred thirty-eight thousand, eight hundred eighty-nine".