163881718811 has 2 divisors, whose sum is σ = 163881718812. Its totient is φ = 163881718810.

The previous prime is 163881718789. The next prime is 163881718849. The reversal of 163881718811 is 118817188361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163881718811 - 2⁶ = 163881718747 is a prime.

It is not a weakly prime, because it can be changed into another prime (163881711811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81940859405 + 81940859406.

It is an arithmetic number, because the mean of its divisors is an integer number (81940859406).

Almost surely, 2^163881718811 is an apocalyptic number.

163881718811 is a deficient number, since it is larger than the sum of its proper divisors (1).

163881718811 is an equidigital number, since it uses as much as digits as its factorization.

163881718811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 53.

The spelling of 163881718811 in words is "one hundred sixty-three billion, eight hundred eighty-one million, seven hundred eighteen thousand, eight hundred eleven".