205000121580 has 24 divisors (see below), whose sum is σ = 574000340592. Its totient is φ = 54666699072.

The previous prime is 205000121537. The next prime is 205000121587. The reversal of 205000121580 is 85121000502.

It is a self number, because there is not a number n which added to its sum of digits gives 205000121580.

It is not an unprimeable number, because it can be changed into a prime (205000121587) 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, 1708334287 + ... + 1708334406.

It is an arithmetic number, because the mean of its divisors is an integer number (23916680858).

Almost surely, 2^205000121580 is an apocalyptic number.

205000121580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205000121580 is an abundant number, since it is smaller than the sum of its proper divisors (369000219012).

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

205000121580 is a wasteful number, since it uses less digits than its factorization.

205000121580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416668705 (or 3416668703 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The spelling of 205000121580 in words is "two hundred five billion, one hundred twenty-one thousand, five hundred eighty".