12688697998 has 8 divisors (see below), whose sum is σ = 19101759192. Its totient is φ = 6321444936.

The previous prime is 12688697963. The next prime is 12688698007. The reversal of 12688697998 is 89979688621.

12688697998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12688697998² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12688697998.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11451340 + ... + 11452447.

It is an arithmetic number, because the mean of its divisors is an integer number (2387719899).

Almost surely, 2^12688697998 is an apocalyptic number.

12688697998 is a deficient number, since it is larger than the sum of its proper divisors (6413061194).

12688697998 is a wasteful number, since it uses less digits than its factorization.

12688697998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22904066.

The product of its digits is 188116992, while the sum is 73.

The spelling of 12688697998 in words is "twelve billion, six hundred eighty-eight million, six hundred ninety-seven thousand, nine hundred ninety-eight".