12784638845 has 8 divisors (see below), whose sum is σ = 16736254560. Its totient is φ = 9297919120.

The previous prime is 12784638833. The next prime is 12784638857. The reversal of 12784638845 is 54883648721.

It is an interprime number because it is at equal distance from previous prime (12784638833) and next prime (12784638857).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12784638845 - 2⁶ = 12784638781 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116223935 + ... + 116224044.

It is an arithmetic number, because the mean of its divisors is an integer number (2092031820).

Almost surely, 2^12784638845 is an apocalyptic number.

It is an amenable number.

12784638845 is a deficient number, since it is larger than the sum of its proper divisors (3951615715).

12784638845 is a wasteful number, since it uses less digits than its factorization.

12784638845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232447995.

The product of its digits is 10321920, while the sum is 56.

The spelling of 12784638845 in words is "twelve billion, seven hundred eighty-four million, six hundred thirty-eight thousand, eight hundred forty-five".