8581223668 has 12 divisors (see below), whose sum is σ = 15423010372. Its totient is φ = 4174649280.

The previous prime is 8581223641. The next prime is 8581223731. The reversal of 8581223668 is 8663221858.

It can be written as a sum of positive squares in 2 ways, for example, as 7402537444 + 1178686224 = 86038^2 + 34332^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28990473 + ... + 28990768.

Almost surely, 2^8581223668 is an apocalyptic number.

It is an amenable number.

8581223668 is a deficient number, since it is larger than the sum of its proper divisors (6841786704).

8581223668 is a wasteful number, since it uses less digits than its factorization.

8581223668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57981282 (or 57981280 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 8581223668 is about 92634.8944404861. The cubic root of 8581223668 is about 2047.3074838162.

The spelling of 8581223668 in words is "eight billion, five hundred eighty-one million, two hundred twenty-three thousand, six hundred sixty-eight".