12687257799 has 8 divisors (see below), whose sum is σ = 18795937520. Its totient is φ = 8458171848.

The previous prime is 12687257797. The next prime is 12687257897. The reversal of 12687257799 is 99775278621.

It is not a de Polignac number, because 12687257799 - 2¹ = 12687257797 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 (12687257797) 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, 234949192 + ... + 234949245.

It is an arithmetic number, because the mean of its divisors is an integer number (2349492190).

Almost surely, 2^12687257799 is an apocalyptic number.

12687257799 is a deficient number, since it is larger than the sum of its proper divisors (6108679721).

12687257799 is an equidigital number, since it uses as much as digits as its factorization.

12687257799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469898446 (or 469898440 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 63.

The spelling of 12687257799 in words is "twelve billion, six hundred eighty-seven million, two hundred fifty-seven thousand, seven hundred ninety-nine".