205043474844 has 144 divisors (see below), whose sum is σ = 584470595072. Its totient is φ = 62477376192.

The previous prime is 205043474843. The next prime is 205043474861. The reversal of 205043474844 is 448474340502.

205043474844 is a `hidden beast` number, since 2 + 0 + 504 + 34 + 74 + 8 + 44 = 666.

It is a super-2 number, since 2×205043474844² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205043474844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205043474843) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1222737 + ... + 1380279.

Almost surely, 2^205043474844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205043474844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292235297536).

205043474844 is an abundant number, since it is smaller than the sum of its proper divisors (379427120228).

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

205043474844 is a wasteful number, since it uses less digits than its factorization.

205043474844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157678 (or 157664 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 45.

The spelling of 205043474844 in words is "two hundred five billion, forty-three million, four hundred seventy-four thousand, eight hundred forty-four".