405685084605 has 8 divisors (see below), whose sum is σ = 649096135392. Its totient is φ = 216365378448.

The previous prime is 405685084603. The next prime is 405685084663. The reversal of 405685084605 is 506480586504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 405685084605 - 2¹ = 405685084603 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405685084603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13522836139 + ... + 13522836168.

It is an arithmetic number, because the mean of its divisors is an integer number (81137016924).

Almost surely, 2^405685084605 is an apocalyptic number.

It is an amenable number.

405685084605 is a deficient number, since it is larger than the sum of its proper divisors (243411050787).

405685084605 is a wasteful number, since it uses less digits than its factorization.

405685084605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27045672315.

The product of its (nonzero) digits is 4608000, while the sum is 51.

The spelling of 405685084605 in words is "four hundred five billion, six hundred eighty-five million, eighty-four thousand, six hundred five".