12844899987 has 4 divisors (see below), whose sum is σ = 17126533320. Its totient is φ = 8563266656.

The previous prime is 12844899961. The next prime is 12844899997. The reversal of 12844899987 is 78999844821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12844899987 - 2⁶ = 12844899923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12844899997) 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, 2140816662 + ... + 2140816667.

It is an arithmetic number, because the mean of its divisors is an integer number (4281633330).

Almost surely, 2^12844899987 is an apocalyptic number.

12844899987 is a deficient number, since it is larger than the sum of its proper divisors (4281633333).

12844899987 is an equidigital number, since it uses as much as digits as its factorization.

12844899987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281633332.

The product of its digits is 83607552, while the sum is 69.

The spelling of 12844899987 in words is "twelve billion, eight hundred forty-four million, eight hundred ninety-nine thousand, nine hundred eighty-seven".