12687816955 has 16 divisors (see below), whose sum is σ = 16891027200. Its totient is φ = 9071102560.

The previous prime is 12687816919. The next prime is 12687816959. The reversal of 12687816955 is 55961878621.

It is a happy number.

It is not a de Polignac number, because 12687816955 - 2¹⁷ = 12687685883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12687816955.

It is not an unprimeable number, because it can be changed into a prime (12687816959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1951735 + ... + 1958224.

It is an arithmetic number, because the mean of its divisors is an integer number (1055689200).

Almost surely, 2^12687816955 is an apocalyptic number.

12687816955 is a deficient number, since it is larger than the sum of its proper divisors (4203210245).

12687816955 is a wasteful number, since it uses less digits than its factorization.

12687816955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910034.

The product of its digits is 7257600, while the sum is 58.

The spelling of 12687816955 in words is "twelve billion, six hundred eighty-seven million, eight hundred sixteen thousand, nine hundred fifty-five".