12766484378 has 4 divisors (see below), whose sum is σ = 19149726570. Its totient is φ = 6383242188.

The previous prime is 12766484327. The next prime is 12766484383. The reversal of 12766484378 is 87348466721.

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., 6848721049 + 5917763329 = 82757^2 + 76927^2 .

It is a Curzon 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 as a sum of consecutive naturals, namely, 3191621093 + ... + 3191621096.

Almost surely, 2^12766484378 is an apocalyptic number.

12766484378 is a deficient number, since it is larger than the sum of its proper divisors (6383242192).

12766484378 is an equidigital number, since it uses as much as digits as its factorization.

12766484378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383242191.

The product of its digits is 10838016, while the sum is 56.

The spelling of 12766484378 in words is "twelve billion, seven hundred sixty-six million, four hundred eighty-four thousand, three hundred seventy-eight".