12356379878 has 4 divisors (see below), whose sum is σ = 18534569820. Its totient is φ = 6178189938.

The previous prime is 12356379863. The next prime is 12356379887. The reversal of 12356379878 is 87897365321.

It is a happy number.

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

It is a congruent 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, 3089094968 + ... + 3089094971.

It is an arithmetic number, because the mean of its divisors is an integer number (4633642455).

Almost surely, 2^12356379878 is an apocalyptic number.

12356379878 is a deficient number, since it is larger than the sum of its proper divisors (6178189942).

12356379878 is an equidigital number, since it uses as much as digits as its factorization.

12356379878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178189941.

The product of its digits is 15240960, while the sum is 59.

The spelling of 12356379878 in words is "twelve billion, three hundred fifty-six million, three hundred seventy-nine thousand, eight hundred seventy-eight".