12378278607 has 4 divisors (see below), whose sum is σ = 16504371480. Its totient is φ = 8252185736.

The previous prime is 12378278569. The next prime is 12378278651. The reversal of 12378278607 is 70687287321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12378278607 - 2²⁰ = 12377230031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12378278607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12378278677) 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 in 3 ways as a sum of consecutive naturals, for example, 2063046432 + ... + 2063046437.

It is an arithmetic number, because the mean of its divisors is an integer number (4126092870).

Almost surely, 2^12378278607 is an apocalyptic number.

12378278607 is a deficient number, since it is larger than the sum of its proper divisors (4126092873).

12378278607 is an equidigital number, since it uses as much as digits as its factorization.

12378278607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126092872.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 12378278607 in words is "twelve billion, three hundred seventy-eight million, two hundred seventy-eight thousand, six hundred seven".