12688367550 has 24 divisors (see below), whose sum is σ = 31467151896. Its totient is φ = 3383564640.

The previous prime is 12688367467. The next prime is 12688367557. The reversal of 12688367550 is 5576388621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12688367493 and 12688367502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688367557) 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, 42294409 + ... + 42294708.

It is an arithmetic number, because the mean of its divisors is an integer number (1311131329).

Almost surely, 2^12688367550 is an apocalyptic number.

12688367550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12688367550 is an abundant number, since it is smaller than the sum of its proper divisors (18778784346).

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

12688367550 is a wasteful number, since it uses less digits than its factorization.

12688367550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84589132 (or 84589127 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 12688367550 in words is "twelve billion, six hundred eighty-eight million, three hundred sixty-seven thousand, five hundred fifty".