12638875123 has 6 divisors (see below), whose sum is σ = 14702364996. Its totient is φ = 10833321492.

The previous prime is 12638875099. The next prime is 12638875159. The reversal of 12638875123 is 32157883621.

It is not a de Polignac number, because 12638875123 - 2¹³ = 12638866931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12638875523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128968065 + ... + 128968162.

It is an arithmetic number, because the mean of its divisors is an integer number (2450394166).

Almost surely, 2^12638875123 is an apocalyptic number.

12638875123 is a deficient number, since it is larger than the sum of its proper divisors (2063489873).

12638875123 is an equidigital number, since it uses as much as digits as its factorization.

12638875123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257936241 (or 257936234 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The spelling of 12638875123 in words is "twelve billion, six hundred thirty-eight million, eight hundred seventy-five thousand, one hundred twenty-three".