205360555554420 has 96 divisors (see below), whose sum is σ = 662328217141248. Its totient is φ = 46569952743552.

The previous prime is 205360555554359. The next prime is 205360555554431. The reversal of 205360555554420 is 24455555063502.

It is a super-2 number, since 2×205360555554420² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1924961242 + ... + 1925067921.

It is an arithmetic number, because the mean of its divisors is an integer number (6899252261888).

Almost surely, 2^{205360555554420} is an apocalyptic number.

205360555554420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205360555554420 is an abundant number, since it is smaller than the sum of its proper divisors (456967661586828).

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

205360555554420 is a wasteful number, since it uses less digits than its factorization.

205360555554420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850029309 (or 3850029307 counting only the distinct ones).

The product of its (nonzero) digits is 18000000, while the sum is 51.

The spelling of 205360555554420 in words is "two hundred five trillion, three hundred sixty billion, five hundred fifty-five million, five hundred fifty-four thousand, four hundred twenty".