204565231045164 has 96 divisors (see below), whose sum is σ = 538765472044800. Its totient is φ = 59840962236160.

The previous prime is 204565231045111. The next prime is 204565231045169. The reversal of 204565231045164 is 461540132565402.

It is a super-2 number, since 2×204565231045164² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204565231045169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16087447 + ... + 25844465.

It is an arithmetic number, because the mean of its divisors is an integer number (5612140333800).

Almost surely, 2^{204565231045164} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204565231045164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269382736022400).

204565231045164 is an abundant number, since it is smaller than the sum of its proper divisors (334200240999636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204565231045164 is a wasteful number, since it uses less digits than its factorization.

204565231045164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9762543 (or 9762541 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 204565231045164 in words is "two hundred four trillion, five hundred sixty-five billion, two hundred thirty-one million, forty-five thousand, one hundred sixty-four".