12778307871111 has 8 divisors (see below), whose sum is σ = 18930826475760. Its totient is φ = 8518871914056.

The previous prime is 12778307871061. The next prime is 12778307871143. The reversal of 12778307871111 is 11117870387721.

It is a de Polignac number, because none of the positive numbers 2^k-12778307871111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778307871211) 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, 236635330920 + ... + 236635330973.

It is an arithmetic number, because the mean of its divisors is an integer number (2366353309470).

Almost surely, 2^{12778307871111} is an apocalyptic number.

12778307871111 is a deficient number, since it is larger than the sum of its proper divisors (6152518604649).

12778307871111 is an equidigital number, since it uses as much as digits as its factorization.

12778307871111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473270661902 (or 473270661896 counting only the distinct ones).

The product of its (nonzero) digits is 921984, while the sum is 54.

The spelling of 12778307871111 in words is "twelve trillion, seven hundred seventy-eight billion, three hundred seven million, eight hundred seventy-one thousand, one hundred eleven".