8539140668 has 24 divisors (see below), whose sum is σ = 15277876992. Its totient is φ = 4174228784.

The previous prime is 8539140653. The next prime is 8539140691. The reversal of 8539140668 is 8660419358.

It is a congruent number.

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, 154055 + ... + 202017.

It is an arithmetic number, because the mean of its divisors is an integer number (636578208).

Almost surely, 2^8539140668 is an apocalyptic number.

It is an amenable number.

8539140668 is a deficient number, since it is larger than the sum of its proper divisors (6738736324).

8539140668 is a wasteful number, since it uses less digits than its factorization.

8539140668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48961 (or 48959 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 8539140668 is about 92407.4708451649. The cubic root of 8539140668 is about 2043.9552786939.

The spelling of 8539140668 in words is "eight billion, five hundred thirty-nine million, one hundred forty thousand, six hundred sixty-eight".