12638878737 has 16 divisors (see below), whose sum is σ = 16888724160. Its totient is φ = 8407498752.

The previous prime is 12638878723. The next prime is 12638878751. The reversal of 12638878737 is 73787883621.

It is an interprime number because it is at equal distance from previous prime (12638878723) and next prime (12638878751).

It is not a de Polignac number, because 12638878737 - 2¹¹ = 12638876689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12638808737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4097998 + ... + 4101080.

It is an arithmetic number, because the mean of its divisors is an integer number (1055545260).

Almost surely, 2^12638878737 is an apocalyptic number.

It is an amenable number.

12638878737 is a deficient number, since it is larger than the sum of its proper divisors (4249845423).

12638878737 is a wasteful number, since it uses less digits than its factorization.

12638878737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632.

The product of its digits is 18966528, while the sum is 60.

The spelling of 12638878737 in words is "twelve billion, six hundred thirty-eight million, eight hundred seventy-eight thousand, seven hundred thirty-seven".