27307000561 has 4 divisors (see below), whose sum is σ = 28248621300. Its totient is φ = 26365379824.

The previous prime is 27307000529. The next prime is 27307000571. The reversal of 27307000561 is 16500070372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6000051600 + 21306948961 = 77460^2 + 145969^2 .

It is a cyclic number.

It is not a de Polignac number, because 27307000561 - 2⁵ = 27307000529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27307000571) 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, 470810326 + ... + 470810383.

It is an arithmetic number, because the mean of its divisors is an integer number (7062155325).

Almost surely, 2^27307000561 is an apocalyptic number.

It is an amenable number.

27307000561 is a deficient number, since it is larger than the sum of its proper divisors (941620739).

27307000561 is an equidigital number, since it uses as much as digits as its factorization.

27307000561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941620738.

The product of its (nonzero) digits is 8820, while the sum is 31.

The spelling of 27307000561 in words is "twenty-seven billion, three hundred seven million, five hundred sixty-one", and thus it is an aban number.