163743809859 has 48 divisors (see below), whose sum is σ = 280849982400. Its totient is φ = 89946678528.

The previous prime is 163743809851. The next prime is 163743809861. The reversal of 163743809859 is 958908347361.

163743809859 is a `hidden beast` number, since 1 + 63 + 7 + 438 + 0 + 98 + 59 = 666.

It is not a de Polignac number, because 163743809859 - 2³ = 163743809851 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 163743809796 and 163743809805.

It is not an unprimeable number, because it can be changed into a prime (163743809851) 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 in 47 ways as a sum of consecutive naturals, for example, 222697 + ... + 614069.

It is an arithmetic number, because the mean of its divisors is an integer number (5851041300).

Almost surely, 2^163743809859 is an apocalyptic number.

163743809859 is a deficient number, since it is larger than the sum of its proper divisors (117106172541).

163743809859 is a wasteful number, since it uses less digits than its factorization.

163743809859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391644 (or 391641 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 163743809859 in words is "one hundred sixty-three billion, seven hundred forty-three million, eight hundred nine thousand, eight hundred fifty-nine".