204164725265 has 4 divisors (see below), whose sum is σ = 244997670324. Its totient is φ = 163331780208.

The previous prime is 204164725211. The next prime is 204164725267. The reversal of 204164725265 is 562527461402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64581040384 + 139583684881 = 254128^2 + 373609^2 .

It is a cyclic number.

It is not a de Polignac number, because 204164725265 - 2²⁸ = 203896289809 is a prime.

It is a super-4 number, since 4×204164725265⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204164725267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20416472522 + ... + 20416472531.

It is an arithmetic number, because the mean of its divisors is an integer number (61249417581).

Almost surely, 2^204164725265 is an apocalyptic number.

It is an amenable number.

204164725265 is a deficient number, since it is larger than the sum of its proper divisors (40832945059).

204164725265 is an equidigital number, since it uses as much as digits as its factorization.

204164725265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40832945058.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 204164725265 in words is "two hundred four billion, one hundred sixty-four million, seven hundred twenty-five thousand, two hundred sixty-five".