12687067561 has 16 divisors (see below), whose sum is σ = 14541004800. Its totient is φ = 10843554960.

The previous prime is 12687067541. The next prime is 12687067579. The reversal of 12687067561 is 16576078621.

It is a happy number.

12687067561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12687067561 - 2²⁵ = 12653513129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12687067531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6043290 + ... + 6045388.

It is an arithmetic number, because the mean of its divisors is an integer number (908812800).

Almost surely, 2^12687067561 is an apocalyptic number.

It is an amenable number.

12687067561 is a deficient number, since it is larger than the sum of its proper divisors (1853937239).

12687067561 is a wasteful number, since it uses less digits than its factorization.

12687067561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 12687067561 in words is "twelve billion, six hundred eighty-seven million, sixty-seven thousand, five hundred sixty-one".