27776864161 has 8 divisors (see below), whose sum is σ = 29462004000. Its totient is φ = 26114044320.

The previous prime is 27776864153. The next prime is 27776864189. The reversal of 27776864161 is 16146867772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27776864161 - 2³ = 27776864153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27776864191) 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 7 ways as a sum of consecutive naturals, for example, 5577436 + ... + 5582413.

It is an arithmetic number, because the mean of its divisors is an integer number (3682750500).

Almost surely, 2^27776864161 is an apocalyptic number.

It is an amenable number.

27776864161 is a deficient number, since it is larger than the sum of its proper divisors (1685139839).

27776864161 is a wasteful number, since it uses less digits than its factorization.

27776864161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11159999.

The product of its digits is 4741632, while the sum is 55.

The spelling of 27776864161 in words is "twenty-seven billion, seven hundred seventy-six million, eight hundred sixty-four thousand, one hundred sixty-one".