204621345056 has 24 divisors (see below), whose sum is σ = 402931452924. Its totient is φ = 102289547520.

The previous prime is 204621345041. The next prime is 204621345067. The reversal of 204621345056 is 650543126402.

It can be written as a sum of positive squares in 2 ways, for example, as 204560816656 + 60528400 = 452284^2 + 7780^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502175 + ... + 813278.

Almost surely, 2^204621345056 is an apocalyptic number.

It is an amenable number.

204621345056 is a deficient number, since it is larger than the sum of its proper divisors (198310107868).

204621345056 is a wasteful number, since it uses less digits than its factorization.

204621345056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320324 (or 1320316 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 204621345056 in words is "two hundred four billion, six hundred twenty-one million, three hundred forty-five thousand, fifty-six".