12663312838 has 24 divisors (see below), whose sum is σ = 21070360080. Its totient is φ = 5703231600.

The previous prime is 12663312833. The next prime is 12663312877. The reversal of 12663312838 is 83821336621.

It is a super-2 number, since 2×12663312838² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12663312794 and 12663312803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663312833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213658 + ... + 266413.

It is an arithmetic number, because the mean of its divisors is an integer number (877931670).

Almost surely, 2^12663312838 is an apocalyptic number.

12663312838 is a deficient number, since it is larger than the sum of its proper divisors (8407047242).

12663312838 is a wasteful number, since it uses less digits than its factorization.

12663312838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480204 (or 480193 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The spelling of 12663312838 in words is "twelve billion, six hundred sixty-three million, three hundred twelve thousand, eight hundred thirty-eight".