84068831565 has 12 divisors (see below), whose sum is σ = 145719308124. Its totient is φ = 44836710144.

The previous prime is 84068831563. The next prime is 84068831611. The reversal of 84068831565 is 56513886048.

84068831565 is a `hidden beast` number, since 8 + 40 + 6 + 8 + 8 + 31 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28525183236 + 55543648329 = 168894^2 + 235677^2 .

It is not a de Polignac number, because 84068831565 - 2¹ = 84068831563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84068831563) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 934098084 + ... + 934098173.

It is an arithmetic number, because the mean of its divisors is an integer number (12143275677).

Almost surely, 2^84068831565 is an apocalyptic number.

It is an amenable number.

84068831565 is a deficient number, since it is larger than the sum of its proper divisors (61650476559).

84068831565 is a wasteful number, since it uses less digits than its factorization.

84068831565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868196268 (or 1868196265 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 84068831565 in words is "eighty-four billion, sixty-eight million, eight hundred thirty-one thousand, five hundred sixty-five".