163566121304 has 8 divisors (see below), whose sum is σ = 306686477460. Its totient is φ = 81783060648.

The previous prime is 163566121219. The next prime is 163566121337. The reversal of 163566121304 is 403121665361.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 10222882574 + ... + 10222882589.

Almost surely, 2^163566121304 is an apocalyptic number.

It is an amenable number.

163566121304 is a deficient number, since it is larger than the sum of its proper divisors (143120356156).

163566121304 is a wasteful number, since it uses less digits than its factorization.

163566121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20445765169 (or 20445765165 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 163566121304 its reverse (403121665361), we get a palindrome (566687786665).

The spelling of 163566121304 in words is "one hundred sixty-three billion, five hundred sixty-six million, one hundred twenty-one thousand, three hundred four".