12687928897 has 4 divisors (see below), whose sum is σ = 14500490176. Its totient is φ = 10875367620.

The previous prime is 12687928867. The next prime is 12687928901. The reversal of 12687928897 is 79882978621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12687928897 - 2¹⁵ = 12687896129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12687928867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 906280629 + ... + 906280642.

It is an arithmetic number, because the mean of its divisors is an integer number (3625122544).

Almost surely, 2^12687928897 is an apocalyptic number.

It is an amenable number.

12687928897 is a deficient number, since it is larger than the sum of its proper divisors (1812561279).

12687928897 is an equidigital number, since it uses as much as digits as its factorization.

12687928897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812561278.

The product of its digits is 48771072, while the sum is 67.

The spelling of 12687928897 in words is "twelve billion, six hundred eighty-seven million, nine hundred twenty-eight thousand, eight hundred ninety-seven".