27216061289 has 2 divisors, whose sum is σ = 27216061290. Its totient is φ = 27216061288.

The previous prime is 27216061219. The next prime is 27216061303. The reversal of 27216061289 is 98216061272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14419926889 + 12796134400 = 120083^2 + 113120^2 .

It is a cyclic number.

It is not a de Polignac number, because 27216061289 - 2¹⁶ = 27215995753 is a prime.

It is not a weakly prime, because it can be changed into another prime (27216061219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13608030644 + 13608030645.

It is an arithmetic number, because the mean of its divisors is an integer number (13608030645).

Almost surely, 2^27216061289 is an apocalyptic number.

It is an amenable number.

27216061289 is a deficient number, since it is larger than the sum of its proper divisors (1).

27216061289 is an equidigital number, since it uses as much as digits as its factorization.

27216061289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 27216061289 in words is "twenty-seven billion, two hundred sixteen million, sixty-one thousand, two hundred eighty-nine".