27790445768 has 36 divisors (see below), whose sum is σ = 55368479985. Its totient is φ = 13074084736.

The previous prime is 27790445747. The next prime is 27790445801. The reversal of 27790445768 is 86754409772.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 25434508324 + 2355937444 = 159482^2 + 48538^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=117878.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8013971 + ... + 8017437.

Almost surely, 2^27790445768 is an apocalyptic number.

It is an amenable number.

27790445768 is a deficient number, since it is larger than the sum of its proper divisors (27578034217).

27790445768 is an frugal number, since it uses more digits than its factorization.

27790445768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 27790445768 in words is "twenty-seven billion, seven hundred ninety million, four hundred forty-five thousand, seven hundred sixty-eight".