27781386784194 has 16 divisors (see below), whose sum is σ = 55705608466560. Its totient is φ = 9236656445040.

The previous prime is 27781386784169. The next prime is 27781386784211. The reversal of 27781386784194 is 49148768318772.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5951451562 + ... + 5951456229.

It is an arithmetic number, because the mean of its divisors is an integer number (3481600529160).

Almost surely, 2^{27781386784194} is an apocalyptic number.

27781386784194 is an abundant number, since it is smaller than the sum of its proper divisors (27924221682366).

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

27781386784194 is a wasteful number, since it uses less digits than its factorization.

27781386784194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11902908185.

The product of its digits is 910393344, while the sum is 75.

The spelling of 27781386784194 in words is "twenty-seven trillion, seven hundred eighty-one billion, three hundred eighty-six million, seven hundred eighty-four thousand, one hundred ninety-four".