27771636367 has 12 divisors (see below), whose sum is σ = 28333187064. Its totient is φ = 27221012000.

The previous prime is 27771636353. The next prime is 27771636371. The reversal of 27771636367 is 76363617772.

It is a de Polignac number, because none of the positive numbers 2^k-27771636367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771636307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3262617 + ... + 3271117.

It is an arithmetic number, because the mean of its divisors is an integer number (2361098922).

Almost surely, 2^27771636367 is an apocalyptic number.

27771636367 is a deficient number, since it is larger than the sum of its proper divisors (561550697).

27771636367 is an equidigital number, since it uses as much as digits as its factorization.

27771636367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770 (or 9717 counting only the distinct ones).

The product of its digits is 9335088, while the sum is 55.

The spelling of 27771636367 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred thirty-six thousand, three hundred sixty-seven".