163563642 has 48 divisors (see below), whose sum is σ = 390480480. Its totient is φ = 49068000.

The previous prime is 163563611. The next prime is 163563661. The reversal of 163563642 is 246365361.

163563642 is a `hidden beast` number, since 1 + 6 + 3 + 5 + 6 + 3 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 163563597 and 163563606.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 15909 + ... + 24087.

It is an arithmetic number, because the mean of its divisors is an integer number (8135010).

Almost surely, 2^163563642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163563642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195240240).

163563642 is an abundant number, since it is smaller than the sum of its proper divisors (226916838).

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

163563642 is a wasteful number, since it uses less digits than its factorization.

163563642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8299 (or 8296 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 163563642 is about 12789.2002095518. The cubic root of 163563642 is about 546.8844699400.

The spelling of 163563642 in words is "one hundred sixty-three million, five hundred sixty-three thousand, six hundred forty-two".