8161213116 has 24 divisors (see below), whose sum is σ = 21763235200. Its totient is φ = 2331775152.

The previous prime is 8161213097. The next prime is 8161213121. The reversal of 8161213116 is 6113121618.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48578566 + ... + 48578733.

Almost surely, 2^8161213116 is an apocalyptic number.

It is an amenable number.

8161213116 is an abundant number, since it is smaller than the sum of its proper divisors (13602022084).

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

8161213116 is a wasteful number, since it uses less digits than its factorization.

8161213116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97157313 (or 97157311 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 8161213116 is about 90339.4327854675. The cubic root of 8161213116 is about 2013.3451813429.

The spelling of 8161213116 in words is "eight billion, one hundred sixty-one million, two hundred thirteen thousand, one hundred sixteen".