163563423765 has 16 divisors (see below), whose sum is σ = 299087403648. Its totient is φ = 74771850816.

The previous prime is 163563423691. The next prime is 163563423791. The reversal of 163563423765 is 567324365361.

It is not a de Polignac number, because 163563423765 - 2¹⁷ = 163563292693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 778873342 + ... + 778873551.

It is an arithmetic number, because the mean of its divisors is an integer number (18692962728).

Almost surely, 2^163563423765 is an apocalyptic number.

163563423765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163563423765 is a deficient number, since it is larger than the sum of its proper divisors (135523979883).

163563423765 is a wasteful number, since it uses less digits than its factorization.

163563423765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557746908.

The product of its digits is 8164800, while the sum is 51.

The spelling of 163563423765 in words is "one hundred sixty-three billion, five hundred sixty-three million, four hundred twenty-three thousand, seven hundred sixty-five".