163968235853 has 2 divisors, whose sum is σ = 163968235854. Its totient is φ = 163968235852.

The previous prime is 163968235801. The next prime is 163968235903. The reversal of 163968235853 is 358532869361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140518520164 + 23449715689 = 374858^2 + 153133^2 .

It is a cyclic number.

It is not a de Polignac number, because 163968235853 - 2²⁰ = 163967187277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163968235792 and 163968235801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163968255853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81984117926 + 81984117927.

It is an arithmetic number, because the mean of its divisors is an integer number (81984117927).

Almost surely, 2^163968235853 is an apocalyptic number.

It is an amenable number.

163968235853 is a deficient number, since it is larger than the sum of its proper divisors (1).

163968235853 is an equidigital number, since it uses as much as digits as its factorization.

163968235853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27993600, while the sum is 59.

The spelling of 163968235853 in words is "one hundred sixty-three billion, nine hundred sixty-eight million, two hundred thirty-five thousand, eight hundred fifty-three".