12784448722 has 4 divisors (see below), whose sum is σ = 19176673086. Its totient is φ = 6392224360.

The previous prime is 12784448713. The next prime is 12784448753. The reversal of 12784448722 is 22784448721.

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

It can be written as a sum of positive squares in only one way, i.e., 9796842441 + 2987606281 = 98979^2 + 54659^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3196112179 + ... + 3196112182.

Almost surely, 2^12784448722 is an apocalyptic number.

12784448722 is a deficient number, since it is larger than the sum of its proper divisors (6392224364).

12784448722 is an equidigital number, since it uses as much as digits as its factorization.

12784448722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6392224363.

The product of its digits is 1605632, while the sum is 49.

Subtracting 12784448722 from its reverse (22784448721), we obtain a palindrome (9999999999).

The spelling of 12784448722 in words is "twelve billion, seven hundred eighty-four million, four hundred forty-eight thousand, seven hundred twenty-two".