12105339567978 has 16 divisors (see below), whose sum is σ = 24436947166560. Its totient is φ = 3997401850896.

The previous prime is 12105339567977. The next prime is 12105339568013. The reversal of 12105339567978 is 87976593350121.

It is not an unprimeable number, because it can be changed into a prime (12105339567977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9427833913 + ... + 9427835196.

It is an arithmetic number, because the mean of its divisors is an integer number (1527309197910).

Almost surely, 2^{12105339567978} is an apocalyptic number.

12105339567978 is an abundant number, since it is smaller than the sum of its proper divisors (12331607598582).

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

12105339567978 is a wasteful number, since it uses less digits than its factorization.

12105339567978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18855669221.

The product of its (nonzero) digits is 85730400, while the sum is 66.

The spelling of 12105339567978 in words is "twelve trillion, one hundred five billion, three hundred thirty-nine million, five hundred sixty-seven thousand, nine hundred seventy-eight".