205170665460 has 24 divisors (see below), whose sum is σ = 574477863456. Its totient is φ = 54712177440.

The previous prime is 205170665419. The next prime is 205170665461. The reversal of 205170665460 is 64566071502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205170665461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709755486 + ... + 1709755605.

It is an arithmetic number, because the mean of its divisors is an integer number (23936577644).

Almost surely, 2^205170665460 is an apocalyptic number.

205170665460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205170665460 is an abundant number, since it is smaller than the sum of its proper divisors (369307197996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205170665460 is a wasteful number, since it uses less digits than its factorization.

205170665460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419511103 (or 3419511101 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 205170665460 in words is "two hundred five billion, one hundred seventy million, six hundred sixty-five thousand, four hundred sixty".