163443556289 has 8 divisors (see below), whose sum is σ = 177573804072. Its totient is φ = 149535832320.

The previous prime is 163443556279. The next prime is 163443556301. The reversal of 163443556289 is 982655344361.

It can be written as a sum of positive squares in 4 ways, for example, as 1833124225 + 161610432064 = 42815^2 + 402008^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163443556289 - 2¹² = 163443552193 is a prime.

It is a super-2 number, since 2×163443556289² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163443556279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55629422 + ... + 55632359.

It is an arithmetic number, because the mean of its divisors is an integer number (22196725509).

Almost surely, 2^163443556289 is an apocalyptic number.

It is an amenable number.

163443556289 is a deficient number, since it is larger than the sum of its proper divisors (14130247783).

163443556289 is a wasteful number, since it uses less digits than its factorization.

163443556289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111261907.

The product of its digits is 18662400, while the sum is 56.

The spelling of 163443556289 in words is "one hundred sixty-three billion, four hundred forty-three million, five hundred fifty-six thousand, two hundred eighty-nine".