12849794378 has 4 divisors (see below), whose sum is σ = 19274691570. Its totient is φ = 6424897188.

The previous prime is 12849794371. The next prime is 12849794401. The reversal of 12849794378 is 87349794821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87349794821 = 6269 ⋅13933609.

It can be written as a sum of positive squares in only one way, i.e., 10916697289 + 1933097089 = 104483^2 + 43967^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12849794378.

It is not an unprimeable number, because it can be changed into a prime (12849794371) by changing a digit.

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 as a sum of consecutive naturals, namely, 3212448593 + ... + 3212448596.

Almost surely, 2^12849794378 is an apocalyptic number.

12849794378 is a deficient number, since it is larger than the sum of its proper divisors (6424897192).

12849794378 is an equidigital number, since it uses as much as digits as its factorization.

12849794378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424897191.

The product of its digits is 24385536, while the sum is 62.

The spelling of 12849794378 in words is "twelve billion, eight hundred forty-nine million, seven hundred ninety-four thousand, three hundred seventy-eight".