205385201885 has 8 divisors (see below), whose sum is σ = 246467565240. Its totient is φ = 164304612864.

The previous prime is 205385201869. The next prime is 205385201893. The reversal of 205385201885 is 588102583502.

It can be written as a sum of positive squares in 4 ways, for example, as 9431128996 + 195954072889 = 97114^2 + 442667^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 205385201885 - 2⁴ = 205385201869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174032 + ... + 664121.

It is an arithmetic number, because the mean of its divisors is an integer number (30808445655).

Almost surely, 2^205385201885 is an apocalyptic number.

It is an amenable number.

205385201885 is a deficient number, since it is larger than the sum of its proper divisors (41082363355).

205385201885 is an equidigital number, since it uses as much as digits as its factorization.

205385201885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887167.

The product of its (nonzero) digits is 768000, while the sum is 47.

The spelling of 205385201885 in words is "two hundred five billion, three hundred eighty-five million, two hundred one thousand, eight hundred eighty-five".