16863136777 has 2 divisors, whose sum is σ = 16863136778. Its totient is φ = 16863136776.

The previous prime is 16863136751. The next prime is 16863136781. The reversal of 16863136777 is 77763136861.

16863136777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14756418576 + 2106718201 = 121476^2 + 45899^2 .

It is an emirp because it is prime and its reverse (77763136861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16863136777 is a prime.

It is not a weakly prime, because it can be changed into another prime (16863136727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8431568388 + 8431568389.

It is an arithmetic number, because the mean of its divisors is an integer number (8431568389).

Almost surely, 2^16863136777 is an apocalyptic number.

It is an amenable number.

16863136777 is a deficient number, since it is larger than the sum of its proper divisors (1).

16863136777 is an equidigital number, since it uses as much as digits as its factorization.

16863136777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 55.

The spelling of 16863136777 in words is "sixteen billion, eight hundred sixty-three million, one hundred thirty-six thousand, seven hundred seventy-seven".