12638655822696 has 128 divisors (see below), whose sum is σ = 32814620467200. Its totient is φ = 4051660757760.

The previous prime is 12638655822691. The next prime is 12638655822707. The reversal of 12638655822696 is 69622855683621.

It is a self number, because there is not a number n which added to its sum of digits gives 12638655822696.

It is not an unprimeable number, because it can be changed into a prime (12638655822691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183969265 + ... + 184037951.

It is an arithmetic number, because the mean of its divisors is an integer number (256364222400).

Almost surely, 2^{12638655822696} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12638655822696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16407310233600).

12638655822696 is an abundant number, since it is smaller than the sum of its proper divisors (20175964644504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12638655822696 is a wasteful number, since it uses less digits than its factorization.

12638655822696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69759 (or 69755 counting only the distinct ones).

The product of its digits is 447897600, while the sum is 69.

The spelling of 12638655822696 in words is "twelve trillion, six hundred thirty-eight billion, six hundred fifty-five million, eight hundred twenty-two thousand, six hundred ninety-six".