12387118454878 has 4 divisors (see below), whose sum is σ = 18580677682320. Its totient is φ = 6193559227438.

The previous prime is 12387118454861. The next prime is 12387118454899. The reversal of 12387118454878 is 87845481178321.

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

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3096779613718 + ... + 3096779613721.

It is an arithmetic number, because the mean of its divisors is an integer number (4645169420580).

Almost surely, 2^{12387118454878} is an apocalyptic number.

12387118454878 is a deficient number, since it is larger than the sum of its proper divisors (6193559227442).

12387118454878 is an equidigital number, since it uses as much as digits as its factorization.

12387118454878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193559227441.

The product of its digits is 96337920, while the sum is 67.

The spelling of 12387118454878 in words is "twelve trillion, three hundred eighty-seven billion, one hundred eighteen million, four hundred fifty-four thousand, eight hundred seventy-eight".