163205443004623 has 4 divisors (see below), whose sum is σ = 163205488684168. Its totient is φ = 163205397325080.

The previous prime is 163205443004621. The next prime is 163205443004651. The reversal of 163205443004623 is 326400344502361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163205443004623 - 2¹ = 163205443004621 is a prime.

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 163205443004623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163205443004621) 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, 16979268 + ... + 24793273.

It is an arithmetic number, because the mean of its divisors is an integer number (40801372171042).

Almost surely, 2^{163205443004623} is an apocalyptic number.

163205443004623 is a deficient number, since it is larger than the sum of its proper divisors (45679545).

163205443004623 is an equidigital number, since it uses as much as digits as its factorization.

163205443004623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45679544.

The product of its (nonzero) digits is 1244160, while the sum is 43.

Adding to 163205443004623 its reverse (326400344502361), we get a palindrome (489605787506984).

The spelling of 163205443004623 in words is "one hundred sixty-three trillion, two hundred five billion, four hundred forty-three million, four thousand, six hundred twenty-three".