204802407601 has 9 divisors (see below), whose sum is σ = 225118862059. Its totient is φ = 186179481400.

The previous prime is 204802407571. The next prime is 204802407611. The reversal of 204802407601 is 106704208402.

It is a happy number.

The square root of 204802407601 is 452551.

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

It can be written as a sum of positive squares in only one way, i.e., 116724039201 + 88078368400 = 341649^2 + 296780^2 .

It is a de Polignac number, because none of the positive numbers 2^k-204802407601 is a prime.

It is a super-2 number, since 2×204802407601² (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 (204802407611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4957491 + ... + 4998631.

Almost surely, 2^204802407601 is an apocalyptic number.

204802407601 is the 452551-st square number.

204802407601 is the 226276-th centered octagonal number.

It is an amenable number.

204802407601 is a deficient number, since it is larger than the sum of its proper divisors (20316454458).

204802407601 is an frugal number, since it uses more digits than its factorization.

204802407601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82304 (or 41152 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 204802407601 in words is "two hundred four billion, eight hundred two million, four hundred seven thousand, six hundred one".