205165345100 has 36 divisors (see below), whose sum is σ = 445228513968. Its totient is φ = 82062504000.

The previous prime is 205165345081. The next prime is 205165345127. The reversal of 205165345100 is 1543561502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4173665 + ... + 4222535.

Almost surely, 2^205165345100 is an apocalyptic number.

205165345100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205165345100 is an abundant number, since it is smaller than the sum of its proper divisors (240063168868).

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

205165345100 is a wasteful number, since it uses less digits than its factorization.

205165345100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90866 (or 90859 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 205165345100 in words is "two hundred five billion, one hundred sixty-five million, three hundred forty-five thousand, one hundred".