12688919515 has 8 divisors (see below), whose sum is σ = 15253096320. Its totient is φ = 10133540352.

The previous prime is 12688919513. The next prime is 12688919557. The reversal of 12688919515 is 51591988621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12688919515 - 2¹ = 12688919513 is a prime.

It is a super-2 number, since 2×12688919515² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12688919513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2196235 + ... + 2202004.

It is an arithmetic number, because the mean of its divisors is an integer number (1906637040).

Almost surely, 2^12688919515 is an apocalyptic number.

12688919515 is a deficient number, since it is larger than the sum of its proper divisors (2564176805).

12688919515 is an equidigital number, since it uses as much as digits as its factorization.

12688919515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398821.

The product of its digits is 1555200, while the sum is 55.

The spelling of 12688919515 in words is "twelve billion, six hundred eighty-eight million, nine hundred nineteen thousand, five hundred fifteen".