84040075688 has 16 divisors (see below), whose sum is σ = 166844268180. Its totient is φ = 39548270848.

The previous prime is 84040075601. The next prime is 84040075703. The reversal of 84040075688 is 88657004048.

It can be written as a sum of positive squares in 2 ways, for example, as 83927248804 + 112826884 = 289702^2 + 10622^2 .

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, 308970731 + ... + 308971002.

Almost surely, 2^84040075688 is an apocalyptic number.

It is an amenable number.

84040075688 is a deficient number, since it is larger than the sum of its proper divisors (82804192492).

84040075688 is a wasteful number, since it uses less digits than its factorization.

84040075688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617941756 (or 617941752 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 50.

The spelling of 84040075688 in words is "eighty-four billion, forty million, seventy-five thousand, six hundred eighty-eight".