8161976068 has 6 divisors (see below), whose sum is σ = 14283458126. Its totient is φ = 4080988032.

The previous prime is 8161976041. The next prime is 8161976077. The reversal of 8161976068 is 8606791618.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8142896644 + 19079424 = 90238^2 + 4368^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020247005 + ... + 1020247012.

Almost surely, 2^8161976068 is an apocalyptic number.

It is an amenable number.

8161976068 is a deficient number, since it is larger than the sum of its proper divisors (6121482058).

8161976068 is a wasteful number, since it uses less digits than its factorization.

8161976068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040494021 (or 2040494019 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 8161976068 is about 90343.6553832088. The cubic root of 8161976068 is about 2013.4079186609.

The spelling of 8161976068 in words is "eight billion, one hundred sixty-one million, nine hundred seventy-six thousand, sixty-eight".