6831385505 has 32 divisors (see below), whose sum is σ = 9541324800. Its totient is φ = 4598327232.

The previous prime is 6831385501. The next prime is 6831385559. The reversal of 6831385505 is 5055831386.

It is a cyclic number.

It is not a de Polignac number, because 6831385505 - 2² = 6831385501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6831385501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1730564 + ... + 1734506.

It is an arithmetic number, because the mean of its divisors is an integer number (298166400).

Almost surely, 2^6831385505 is an apocalyptic number.

It is an amenable number.

6831385505 is a deficient number, since it is larger than the sum of its proper divisors (2709939295).

6831385505 is a wasteful number, since it uses less digits than its factorization.

6831385505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853.

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 6831385505 is about 82652.1960083336. The cubic root of 6831385505 is about 1897.4467555882.

The spelling of 6831385505 in words is "six billion, eight hundred thirty-one million, three hundred eighty-five thousand, five hundred five".