8681965672 has 16 divisors (see below), whose sum is σ = 16281965700. Its totient is φ = 4340108160.

The previous prime is 8681965651. The next prime is 8681965681. The reversal of 8681965672 is 2765691868.

It can be written as a sum of positive squares in 2 ways, for example, as 8583281316 + 98684356 = 92646^2 + 9934^2 .

It is a super-3 number, since 3×8681965672³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66147 + ... + 147442.

Almost surely, 2^8681965672 is an apocalyptic number.

It is an amenable number.

8681965672 is a deficient number, since it is larger than the sum of its proper divisors (7600000028).

8681965672 is a wasteful number, since it uses less digits than its factorization.

8681965672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218676 (or 218672 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The square root of 8681965672 is about 93177.0662341330. The cubic root of 8681965672 is about 2055.2880072618.

The spelling of 8681965672 in words is "eight billion, six hundred eighty-one million, nine hundred sixty-five thousand, six hundred seventy-two".