27216525563 has 2 divisors, whose sum is σ = 27216525564. Its totient is φ = 27216525562.

The previous prime is 27216525559. The next prime is 27216525593. The reversal of 27216525563 is 36552561272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27216525563 - 2² = 27216525559 is a prime.

It is not a weakly prime, because it can be changed into another prime (27216525593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13608262781 + 13608262782.

It is an arithmetic number, because the mean of its divisors is an integer number (13608262782).

Almost surely, 2^27216525563 is an apocalyptic number.

27216525563 is a deficient number, since it is larger than the sum of its proper divisors (1).

27216525563 is an equidigital number, since it uses as much as digits as its factorization.

27216525563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 44.

The spelling of 27216525563 in words is "twenty-seven billion, two hundred sixteen million, five hundred twenty-five thousand, five hundred sixty-three".