163563131775 has 24 divisors (see below), whose sum is σ = 272488702464. Its totient is φ = 86567759200.

The previous prime is 163563131717. The next prime is 163563131783. The reversal of 163563131775 is 577131365361.

It is not a de Polignac number, because 163563131775 - 2¹¹ = 163563129727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8313999 + ... + 8333648.

It is an arithmetic number, because the mean of its divisors is an integer number (11353695936).

Almost surely, 2^163563131775 is an apocalyptic number.

163563131775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163563131775 is a deficient number, since it is larger than the sum of its proper divisors (108925570689).

163563131775 is a wasteful number, since it uses less digits than its factorization.

163563131775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16647791 (or 16647786 counting only the distinct ones).

The product of its digits is 1190700, while the sum is 48.

The spelling of 163563131775 in words is "one hundred sixty-three billion, five hundred sixty-three million, one hundred thirty-one thousand, seven hundred seventy-five".