163863265447 has 4 divisors (see below), whose sum is σ = 187272303376. Its totient is φ = 140454227520.

The previous prime is 163863265427. The next prime is 163863265453. The reversal of 163863265447 is 744562368361.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163863265447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163863265417) 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, 11704518954 + ... + 11704518967.

It is an arithmetic number, because the mean of its divisors is an integer number (46818075844).

Almost surely, 2^163863265447 is an apocalyptic number.

163863265447 is a deficient number, since it is larger than the sum of its proper divisors (23409037929).

163863265447 is an equidigital number, since it uses as much as digits as its factorization.

163863265447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23409037928.

The product of its digits is 17418240, while the sum is 55.

The spelling of 163863265447 in words is "one hundred sixty-three billion, eight hundred sixty-three million, two hundred sixty-five thousand, four hundred forty-seven".