27727160821 has 4 divisors (see below), whose sum is σ = 27832587552. Its totient is φ = 27621734092.

The previous prime is 27727160789. The next prime is 27727160831. The reversal of 27727160821 is 12806172772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27727160821 - 2⁵ = 27727160789 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 (27727160831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52712971 + ... + 52713496.

It is an arithmetic number, because the mean of its divisors is an integer number (6958146888).

Almost surely, 2^27727160821 is an apocalyptic number.

It is an amenable number.

27727160821 is a deficient number, since it is larger than the sum of its proper divisors (105426731).

27727160821 is a wasteful number, since it uses less digits than its factorization.

27727160821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105426730.

The product of its (nonzero) digits is 131712, while the sum is 43.

The spelling of 27727160821 in words is "twenty-seven billion, seven hundred twenty-seven million, one hundred sixty thousand, eight hundred twenty-one".