12817794944 has 32 divisors (see below), whose sum is σ = 25578234000. Its totient is φ = 6398159872.

The previous prime is 12817794931. The next prime is 12817794949. The reversal of 12817794944 is 44949771821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 12817794944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12817794949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6917 + ... + 160260.

Almost surely, 2^12817794944 is an apocalyptic number.

It is an amenable number.

12817794944 is a deficient number, since it is larger than the sum of its proper divisors (12760439056).

12817794944 is an equidigital number, since it uses as much as digits as its factorization.

12817794944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167790 (or 167778 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The spelling of 12817794944 in words is "twelve billion, eight hundred seventeen million, seven hundred ninety-four thousand, nine hundred forty-four".