205044405540 has 96 divisors (see below), whose sum is σ = 654657655680. Its totient is φ = 47503497216.

The previous prime is 205044405509. The next prime is 205044405551. The reversal of 205044405540 is 45504440502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7718430 + ... + 7744949.

It is an arithmetic number, because the mean of its divisors is an integer number (6819350580).

Almost surely, 2^205044405540 is an apocalyptic number.

205044405540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205044405540 is an abundant number, since it is smaller than the sum of its proper divisors (449613250140).

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

205044405540 is a wasteful number, since it uses less digits than its factorization.

205044405540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15463421 (or 15463419 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 33.

The spelling of 205044405540 in words is "two hundred five billion, forty-four million, four hundred five thousand, five hundred forty".