204532776009 has 27 divisors (see below), whose sum is σ = 297168942343. Its totient is φ = 135560123232.

The previous prime is 204532776001. The next prime is 204532776029. The reversal of 204532776009 is 900677235402.

The square root of 204532776009 is 452253.

It is a perfect power (a square), and thus also a powerful number.

204532776009 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 32 + 7 + 7 + 600 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41536478025 + 162996297984 = 203805^2 + 403728^2 .

It is not a de Polignac number, because 204532776009 - 2³ = 204532776001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204532776001) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 316124524 + ... + 316125170.

Almost surely, 2^204532776009 is an apocalyptic number.

204532776009 is the 452253-rd square number.

204532776009 is the 226127-th centered octagonal number.

It is an amenable number.

204532776009 is a deficient number, since it is larger than the sum of its proper divisors (92636166334).

204532776009 is an frugal number, since it uses more digits than its factorization.

204532776009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 204532776009 in words is "two hundred four billion, five hundred thirty-two million, seven hundred seventy-six thousand, nine".