12378278675 has 24 divisors (see below), whose sum is σ = 17558772000. Its totient is φ = 8479745280.

The previous prime is 12378278651. The next prime is 12378278677. The reversal of 12378278675 is 57687287321.

12378278675 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12378278675 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12378278675.

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 (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149861 + ... + 217289.

It is an arithmetic number, because the mean of its divisors is an integer number (731615500).

Almost surely, 2^12378278675 is an apocalyptic number.

12378278675 is a deficient number, since it is larger than the sum of its proper divisors (5180493325).

12378278675 is a wasteful number, since it uses less digits than its factorization.

12378278675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68495 (or 68490 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 56.

The spelling of 12378278675 in words is "twelve billion, three hundred seventy-eight million, two hundred seventy-eight thousand, six hundred seventy-five".