163209733056 has 196 divisors, whose sum is σ = 490134978072. Its totient is φ = 53893154304.

The previous prime is 163209733019. The next prime is 163209733067. The reversal of 163209733056 is 650337902361.

163209733056 is a `hidden beast` number, since 1 + 63 + 209 + 7 + 330 + 56 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4975846 + ... + 5008538.

Almost surely, 2^163209733056 is an apocalyptic number.

163209733056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163209733056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245067489036).

163209733056 is an abundant number, since it is smaller than the sum of its proper divisors (326925245016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163209733056 is an equidigital number, since it uses as much as digits as its factorization.

163209733056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32830 (or 32805 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 45.

The spelling of 163209733056 in words is "one hundred sixty-three billion, two hundred nine million, seven hundred thirty-three thousand, fifty-six".