16863609779 has 2 divisors, whose sum is σ = 16863609780. Its totient is φ = 16863609778.

The previous prime is 16863609727. The next prime is 16863609781. The reversal of 16863609779 is 97790636861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16863609779 is a prime.

Together with 16863609781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16863609709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8431804889 + 8431804890.

It is an arithmetic number, because the mean of its divisors is an integer number (8431804890).

Almost surely, 2^16863609779 is an apocalyptic number.

16863609779 is a deficient number, since it is larger than the sum of its proper divisors (1).

16863609779 is an equidigital number, since it uses as much as digits as its factorization.

16863609779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 16863609779 in words is "sixteen billion, eight hundred sixty-three million, six hundred nine thousand, seven hundred seventy-nine".