163420647563 has 4 divisors (see below), whose sum is σ = 163422194928. Its totient is φ = 163419100200.

The previous prime is 163420647553. The next prime is 163420647571. The reversal of 163420647563 is 365746024361.

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 163420647563 - 2⁶ = 163420647499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163420647553) 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, 602663 + ... + 830688.

It is an arithmetic number, because the mean of its divisors is an integer number (40855548732).

Almost surely, 2^163420647563 is an apocalyptic number.

163420647563 is a deficient number, since it is larger than the sum of its proper divisors (1547365).

163420647563 is a wasteful number, since it uses less digits than its factorization.

163420647563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547364.

The product of its (nonzero) digits is 2177280, while the sum is 47.

The spelling of 163420647563 in words is "one hundred sixty-three billion, four hundred twenty million, six hundred forty-seven thousand, five hundred sixty-three".