985409918205 has 16 divisors (see below), whose sum is σ = 1577635805760. Its totient is φ = 525225310848.

The previous prime is 985409918203. The next prime is 985409918221. The reversal of 985409918205 is 502819904589.

It is not a de Polignac number, because 985409918205 - 2¹ = 985409918203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985409918203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20390407 + ... + 20438676.

It is an arithmetic number, because the mean of its divisors is an integer number (98602237860).

Almost surely, 2^985409918205 is an apocalyptic number.

It is an amenable number.

985409918205 is a deficient number, since it is larger than the sum of its proper divisors (592225887555).

985409918205 is a wasteful number, since it uses less digits than its factorization.

985409918205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40830700.

The product of its (nonzero) digits is 9331200, while the sum is 60.

The spelling of 985409918205 in words is "nine hundred eighty-five billion, four hundred nine million, nine hundred eighteen thousand, two hundred five".