8671221768 has 32 divisors (see below), whose sum is σ = 23648787360. Its totient is φ = 2627642880.

The previous prime is 8671221749. The next prime is 8671221787.

8671221768 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (8671221749) and next prime (8671221787).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16422505 + ... + 16423032.

It is an arithmetic number, because the mean of its divisors is an integer number (739024605).

Almost surely, 2^8671221768 is an apocalyptic number.

8671221768 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8671221768 is an abundant number, since it is smaller than the sum of its proper divisors (14977565592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8671221768 is a wasteful number, since it uses less digits than its factorization.

8671221768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32845557 (or 32845553 counting only the distinct ones).

The product of its digits is 451584, while the sum is 48.

The square root of 8671221768 is about 93119.3952299949. The cubic root of 8671221768 is about 2054.4398532504.

The spelling of 8671221768 in words is "eight billion, six hundred seventy-one million, two hundred twenty-one thousand, seven hundred sixty-eight".