27568089406721 has 2 divisors, whose sum is σ = 27568089406722. Its totient is φ = 27568089406720.

The previous prime is 27568089406717. The next prime is 27568089406747. The reversal of 27568089406721 is 12760498086572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27559234596721 + 8854810000 = 5249689^2 + 94100^2 .

It is a cyclic number.

It is not a de Polignac number, because 27568089406721 - 2² = 27568089406717 is a prime.

It is not a weakly prime, because it can be changed into another prime (27568089466721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13784044703360 + 13784044703361.

It is an arithmetic number, because the mean of its divisors is an integer number (13784044703361).

Almost surely, 2^{27568089406721} is an apocalyptic number.

It is an amenable number.

27568089406721 is a deficient number, since it is larger than the sum of its proper divisors (1).

27568089406721 is an equidigital number, since it uses as much as digits as its factorization.

27568089406721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 27568089406721 in words is "twenty-seven trillion, five hundred sixty-eight billion, eighty-nine million, four hundred six thousand, seven hundred twenty-one".