12808912994 has 4 divisors (see below), whose sum is σ = 19213369494. Its totient is φ = 6404456496.

The previous prime is 12808912943. The next prime is 12808912997. The reversal of 12808912994 is 49921980821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49921980821 = 9467 ⋅5273263.

It can be written as a sum of positive squares in only one way, i.e., 10829107969 + 1979805025 = 104063^2 + 44495^2 .

It is not an unprimeable number, because it can be changed into a prime (12808912997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202228247 + ... + 3202228250.

Almost surely, 2^12808912994 is an apocalyptic number.

12808912994 is a deficient number, since it is larger than the sum of its proper divisors (6404456500).

12808912994 is an equidigital number, since it uses as much as digits as its factorization.

12808912994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404456499.

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 12808912994 in words is "twelve billion, eight hundred eight million, nine hundred twelve thousand, nine hundred ninety-four".