205345265660 has 12 divisors (see below), whose sum is σ = 431225057928. Its totient is φ = 82138106256.

The previous prime is 205345265579. The next prime is 205345265681. The reversal of 205345265660 is 66562543502.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5133631622 + ... + 5133631661.

It is an arithmetic number, because the mean of its divisors is an integer number (35935421494).

Almost surely, 2^205345265660 is an apocalyptic number.

205345265660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205345265660 is an abundant number, since it is smaller than the sum of its proper divisors (225879792268).

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

205345265660 is a wasteful number, since it uses less digits than its factorization.

205345265660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10267263292 (or 10267263290 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

It can be divided in two parts, 2053452 and 65660, that added together give a palindrome (2119112).

The spelling of 205345265660 in words is "two hundred five billion, three hundred forty-five million, two hundred sixty-five thousand, six hundred sixty".