12117287378 has 16 divisors (see below), whose sum is σ = 21442573824. Its totient is φ = 5025602880.

The previous prime is 12117287341. The next prime is 12117287393. The reversal of 12117287378 is 87378271121.

12117287378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12117287378² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13959575 + ... + 13960442.

It is an arithmetic number, because the mean of its divisors is an integer number (1340160864).

Almost surely, 2^12117287378 is an apocalyptic number.

12117287378 is a deficient number, since it is larger than the sum of its proper divisors (9325286446).

12117287378 is a wasteful number, since it uses less digits than its factorization.

12117287378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27920057.

The product of its digits is 263424, while the sum is 47.

The spelling of 12117287378 in words is "twelve billion, one hundred seventeen million, two hundred eighty-seven thousand, three hundred seventy-eight".