12608794638 has 128 divisors (see below), whose sum is σ = 31811097600. Its totient is φ = 3666902400.

The previous prime is 12608794619. The next prime is 12608794661. The reversal of 12608794638 is 83649780621.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2977983 + ... + 2982213.

It is an arithmetic number, because the mean of its divisors is an integer number (248524200).

Almost surely, 2^12608794638 is an apocalyptic number.

12608794638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12608794638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15905548800).

12608794638 is an abundant number, since it is smaller than the sum of its proper divisors (19202302962).

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

12608794638 is a wasteful number, since it uses less digits than its factorization.

12608794638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455 (or 4449 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 12608794638 in words is "twelve billion, six hundred eight million, seven hundred ninety-four thousand, six hundred thirty-eight".