163864316563 has 4 divisors (see below), whose sum is σ = 163873549008. Its totient is φ = 163855084120.

The previous prime is 163864316533. The next prime is 163864316617. The reversal of 163864316563 is 365613468361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365613468361 = 4603 ⋅79429387.

It is a cyclic number.

It is not a de Polignac number, because 163864316563 - 2²⁵ = 163830762131 is a prime.

It is a super-2 number, since 2×163864316563² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163864316563.

It is not an unprimeable number, because it can be changed into a prime (163864316503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4589548 + ... + 4625113.

It is an arithmetic number, because the mean of its divisors is an integer number (40968387252).

Almost surely, 2^163864316563 is an apocalyptic number.

163864316563 is a deficient number, since it is larger than the sum of its proper divisors (9232445).

163864316563 is an equidigital number, since it uses as much as digits as its factorization.

163864316563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9232444.

The product of its digits is 5598720, while the sum is 52.

The spelling of 163864316563 in words is "one hundred sixty-three billion, eight hundred sixty-four million, three hundred sixteen thousand, five hundred sixty-three".