8221163849 has 8 divisors (see below), whose sum is σ = 8299892448. Its totient is φ = 8142470560.

The previous prime is 8221163809. The next prime is 8221163869. The reversal of 8221163849 is 9483611228.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8221163849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221163809) 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, 892829 + ... + 901989.

It is an arithmetic number, because the mean of its divisors is an integer number (1037486556).

Almost surely, 2^8221163849 is an apocalyptic number.

It is an amenable number.

8221163849 is a deficient number, since it is larger than the sum of its proper divisors (78728599).

8221163849 is a wasteful number, since it uses less digits than its factorization.

8221163849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17655.

The product of its digits is 165888, while the sum is 44.

The square root of 8221163849 is about 90670.6338844060. The cubic root of 8221163849 is about 2018.2630437471.

The spelling of 8221163849 in words is "eight billion, two hundred twenty-one million, one hundred sixty-three thousand, eight hundred forty-nine".