8221163870 has 16 divisors (see below), whose sum is σ = 14799818880. Its totient is φ = 3288082464.

The previous prime is 8221163869. The next prime is 8221163879. The reversal of 8221163870 is 783611228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221163879) 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, 52211 + ... + 138449.

It is an arithmetic number, because the mean of its divisors is an integer number (924988680).

Almost surely, 2^8221163870 is an apocalyptic number.

8221163870 is a deficient number, since it is larger than the sum of its proper divisors (6578655010).

8221163870 is a wasteful number, since it uses less digits than its factorization.

8221163870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95779.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 8221163870 is about 90670.6340002098. The cubic root of 8221163870 is about 2018.2630454656.

The spelling of 8221163870 in words is "eight billion, two hundred twenty-one million, one hundred sixty-three thousand, eight hundred seventy".