12384907878 has 24 divisors (see below), whose sum is σ = 28813867992. Its totient is φ = 3538545024.

The previous prime is 12384907877. The next prime is 12384907901. The reversal of 12384907878 is 87870948321.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12384907877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21062475 + ... + 21063062.

It is an arithmetic number, because the mean of its divisors is an integer number (1200577833).

Almost surely, 2^12384907878 is an apocalyptic number.

12384907878 is an abundant number, since it is smaller than the sum of its proper divisors (16428960114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12384907878 is a wasteful number, since it uses less digits than its factorization.

12384907878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42125556 (or 42125549 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 12384907878 in words is "twelve billion, three hundred eighty-four million, nine hundred seven thousand, eight hundred seventy-eight".