204985215444 has 12 divisors (see below), whose sum is σ = 478298836064. Its totient is φ = 68328405144.

The previous prime is 204985215443. The next prime is 204985215493. The reversal of 204985215444 is 444512589402.

204985215444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×204985215444² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204985215393 and 204985215402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204985215443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8541050632 + ... + 8541050655.

Almost surely, 2^204985215444 is an apocalyptic number.

It is an amenable number.

204985215444 is an abundant number, since it is smaller than the sum of its proper divisors (273313620620).

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

204985215444 is a wasteful number, since it uses less digits than its factorization.

204985215444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17082101294 (or 17082101292 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 48.

The spelling of 204985215444 in words is "two hundred four billion, nine hundred eighty-five million, two hundred fifteen thousand, four hundred forty-four".