8721120163 has 8 divisors (see below), whose sum is σ = 10130388320. Its totient is φ = 7352700480.

The previous prime is 8721120131. The next prime is 8721120169. The reversal of 8721120163 is 3610211278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8721120163 - 2⁵ = 8721120131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8721120169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10211658 + ... + 10212511.

It is an arithmetic number, because the mean of its divisors is an integer number (1266298540).

Almost surely, 2^8721120163 is an apocalyptic number.

8721120163 is a deficient number, since it is larger than the sum of its proper divisors (1409268157).

8721120163 is a wasteful number, since it uses less digits than its factorization.

8721120163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20424237.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 8721120163 is about 93386.9378607094. The cubic root of 8721120163 is about 2058.3730644850.

The spelling of 8721120163 in words is "eight billion, seven hundred twenty-one million, one hundred twenty thousand, one hundred sixty-three".