8161688222 has 16 divisors (see below), whose sum is σ = 12897435600. Its totient is φ = 3862895040.

The previous prime is 8161688221. The next prime is 8161688233. The reversal of 8161688222 is 2228861618.

It is a super-2 number, since 2×8161688222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161688221) 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, 40679 + ... + 134082.

It is an arithmetic number, because the mean of its divisors is an integer number (806089725).

Almost surely, 2^8161688222 is an apocalyptic number.

8161688222 is a deficient number, since it is larger than the sum of its proper divisors (4735747378).

8161688222 is a wasteful number, since it uses less digits than its factorization.

8161688222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176011.

The product of its digits is 147456, while the sum is 44.

The square root of 8161688222 is about 90342.0623076538. The cubic root of 8161688222 is about 2013.3842496285.

The spelling of 8161688222 in words is "eight billion, one hundred sixty-one million, six hundred eighty-eight thousand, two hundred twenty-two".