204880117281 has 16 divisors (see below), whose sum is σ = 312232426368. Its totient is φ = 117061545600.

The previous prime is 204880117259. The next prime is 204880117297. The reversal of 204880117281 is 182711088402.

It is not a de Polignac number, because 204880117281 - 2⁵ = 204880117249 is a prime.

It is a super-2 number, since 2×204880117281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204880113281) 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 15 ways as a sum of consecutive naturals, for example, 335380 + ... + 722661.

It is an arithmetic number, because the mean of its divisors is an integer number (19514526648).

Almost surely, 2^204880117281 is an apocalyptic number.

204880117281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

204880117281 is a deficient number, since it is larger than the sum of its proper divisors (107352309087).

204880117281 is a wasteful number, since it uses less digits than its factorization.

204880117281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067272.

The product of its (nonzero) digits is 57344, while the sum is 42.

The spelling of 204880117281 in words is "two hundred four billion, eight hundred eighty million, one hundred seventeen thousand, two hundred eighty-one".