204544474561 has 8 divisors (see below), whose sum is σ = 233775319104. Its totient is φ = 175316181360.

The previous prime is 204544474553. The next prime is 204544474573. The reversal of 204544474561 is 165474445402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204544474561 - 2³ = 204544474553 is a prime.

It is a super-2 number, since 2×204544474561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204544474501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462835 + ... + 789496.

It is an arithmetic number, because the mean of its divisors is an integer number (29221914888).

Almost surely, 2^204544474561 is an apocalyptic number.

It is an amenable number.

204544474561 is a deficient number, since it is larger than the sum of its proper divisors (29230844543).

204544474561 is a wasteful number, since it uses less digits than its factorization.

204544474561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275671.

The product of its (nonzero) digits is 2150400, while the sum is 46.

The spelling of 204544474561 in words is "two hundred four billion, five hundred forty-four million, four hundred seventy-four thousand, five hundred sixty-one".