8720445163 has 4 divisors (see below), whose sum is σ = 8730597880. Its totient is φ = 8710292448.

The previous prime is 8720445157. The next prime is 8720445179. The reversal of 8720445163 is 3615440278.

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 8720445163 - 2⁵ = 8720445131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8720445763) 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, 5075070 + ... + 5076787.

It is an arithmetic number, because the mean of its divisors is an integer number (2182649470).

Almost surely, 2^8720445163 is an apocalyptic number.

8720445163 is a deficient number, since it is larger than the sum of its proper divisors (10152717).

8720445163 is a wasteful number, since it uses less digits than its factorization.

8720445163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10152716.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 8720445163 is about 93383.3237949903. The cubic root of 8720445163 is about 2058.3199582464.

The spelling of 8720445163 in words is "eight billion, seven hundred twenty million, four hundred forty-five thousand, one hundred sixty-three".