205100534440 has 64 divisors (see below), whose sum is σ = 489911716800. Its totient is φ = 77010490368.

The previous prime is 205100534437. The next prime is 205100534459. The reversal of 205100534440 is 44435001502.

205100534440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205100534440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205100534399 and 205100534408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140194 + ... + 655633.

It is an arithmetic number, because the mean of its divisors is an integer number (7654870575).

Almost surely, 2^205100534440 is an apocalyptic number.

205100534440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205100534440 is an abundant number, since it is smaller than the sum of its proper divisors (284811182360).

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

205100534440 is a wasteful number, since it uses less digits than its factorization.

205100534440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796234 (or 796230 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 205100534440 its reverse (44435001502), we get a palindrome (249535535942).

The spelling of 205100534440 in words is "two hundred five billion, one hundred million, five hundred thirty-four thousand, four hundred forty".