8617721136 has 40 divisors (see below), whose sum is σ = 22682499120. Its totient is φ = 2818373376.

The previous prime is 8617721089. The next prime is 8617721153. The reversal of 8617721136 is 6311277168.

It is a super-2 number, since 2×8617721136² (a number of 21 digits) contains 22 as substring.

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, 1691191 + ... + 1696278.

It is an arithmetic number, because the mean of its divisors is an integer number (567062478).

Almost surely, 2^8617721136 is an apocalyptic number.

It is an amenable number.

8617721136 is an abundant number, since it is smaller than the sum of its proper divisors (14064777984).

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

8617721136 is a wasteful number, since it uses less digits than its factorization.

8617721136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387533 (or 3387527 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 8617721136 is about 92831.6817471277. The cubic root of 8617721136 is about 2050.2058992873.

The spelling of 8617721136 in words is "eight billion, six hundred seventeen million, seven hundred twenty-one thousand, one hundred thirty-six".