16863609727 has 2 divisors, whose sum is σ = 16863609728. Its totient is φ = 16863609726.

The previous prime is 16863609709. The next prime is 16863609779. The reversal of 16863609727 is 72790636861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16863609727 - 2⁷ = 16863609599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16863609797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8431804863 + 8431804864.

It is an arithmetic number, because the mean of its divisors is an integer number (8431804864).

Almost surely, 2^16863609727 is an apocalyptic number.

16863609727 is a deficient number, since it is larger than the sum of its proper divisors (1).

16863609727 is an equidigital number, since it uses as much as digits as its factorization.

16863609727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 16863609727 in words is "sixteen billion, eight hundred sixty-three million, six hundred nine thousand, seven hundred twenty-seven".