404817390085 has 4 divisors (see below), whose sum is σ = 485780868108. Its totient is φ = 323853912064.

The previous prime is 404817390083. The next prime is 404817390127. The reversal of 404817390085 is 580093718404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163113400129 + 241703989956 = 403873^2 + 491634^2 .

It is a cyclic number.

It is not a de Polignac number, because 404817390085 - 2¹ = 404817390083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404817390083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40481739004 + ... + 40481739013.

It is an arithmetic number, because the mean of its divisors is an integer number (121445217027).

Almost surely, 2^404817390085 is an apocalyptic number.

It is an amenable number.

404817390085 is a deficient number, since it is larger than the sum of its proper divisors (80963478023).

404817390085 is an equidigital number, since it uses as much as digits as its factorization.

404817390085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80963478022.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 404817390085 in words is "four hundred four billion, eight hundred seventeen million, three hundred ninety thousand, eighty-five".