12687105261 has 8 divisors (see below), whose sum is σ = 16964891424. Its totient is φ = 8433694640.

The previous prime is 12687105259. The next prime is 12687105289. The reversal of 12687105261 is 16250178621.

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 12687105261 - 2¹ = 12687105259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12687105241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6092670 + ... + 6094751.

It is an arithmetic number, because the mean of its divisors is an integer number (2120611428).

Almost surely, 2^12687105261 is an apocalyptic number.

It is an amenable number.

12687105261 is a deficient number, since it is larger than the sum of its proper divisors (4277786163).

12687105261 is a wasteful number, since it uses less digits than its factorization.

12687105261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12187771.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 12687105261 in words is "twelve billion, six hundred eighty-seven million, one hundred five thousand, two hundred sixty-one".