216506448727 has 2 divisors, whose sum is σ = 216506448728. Its totient is φ = 216506448726.

The previous prime is 216506448709. The next prime is 216506448733. The reversal of 216506448727 is 727844605612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216506448727 - 2²⁷ = 216372230999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216506448737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108253224363 + 108253224364.

It is an arithmetic number, because the mean of its divisors is an integer number (108253224364).

Almost surely, 2^216506448727 is an apocalyptic number.

216506448727 is a deficient number, since it is larger than the sum of its proper divisors (1).

216506448727 is an equidigital number, since it uses as much as digits as its factorization.

216506448727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 216506448727 in words is "two hundred sixteen billion, five hundred six million, four hundred forty-eight thousand, seven hundred twenty-seven".