12784138046 has 4 divisors (see below), whose sum is σ = 19176207072. Its totient is φ = 6392069022.

The previous prime is 12784138043. The next prime is 12784138061. The reversal of 12784138046 is 64083148721.

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

It is a junction number, because it is equal to n+sod(n) for n = 12784137988 and 12784138006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12784138043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3196034510 + ... + 3196034513.

It is an arithmetic number, because the mean of its divisors is an integer number (4794051768).

Almost surely, 2^12784138046 is an apocalyptic number.

12784138046 is a deficient number, since it is larger than the sum of its proper divisors (6392069026).

12784138046 is an equidigital number, since it uses as much as digits as its factorization.

12784138046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392069025.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 12784138046 in words is "twelve billion, seven hundred eighty-four million, one hundred thirty-eight thousand, forty-six".