12688145287 has 4 divisors (see below), whose sum is σ = 12692154816. Its totient is φ = 12684135760.

The previous prime is 12688145243. The next prime is 12688145291. The reversal of 12688145287 is 78254188621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12688145287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688145087) 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 3 ways as a sum of consecutive naturals, for example, 2000014 + ... + 2006347.

It is an arithmetic number, because the mean of its divisors is an integer number (3173038704).

Almost surely, 2^12688145287 is an apocalyptic number.

12688145287 is a deficient number, since it is larger than the sum of its proper divisors (4009529).

12688145287 is an equidigital number, since it uses as much as digits as its factorization.

12688145287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009528.

The product of its digits is 1720320, while the sum is 52.

The spelling of 12688145287 in words is "twelve billion, six hundred eighty-eight million, one hundred forty-five thousand, two hundred eighty-seven".