8161617616 has 20 divisors (see below), whose sum is σ = 15827504832. Its totient is φ = 4077100256.

The previous prime is 8161617437. The next prime is 8161617679. The reversal of 8161617616 is 6167161618.

It is a super-2 number, since 2×8161617616² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213586 + ... + 248881.

Almost surely, 2^8161617616 is an apocalyptic number.

It is an amenable number.

8161617616 is a deficient number, since it is larger than the sum of its proper divisors (7665887216).

8161617616 is a wasteful number, since it uses less digits than its factorization.

8161617616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463578 (or 463572 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 8161617616 is about 90341.6715364510. The cubic root of 8161617616 is about 2013.3784437456.

The spelling of 8161617616 in words is "eight billion, one hundred sixty-one million, six hundred seventeen thousand, six hundred sixteen".