204764465 has 4 divisors (see below), whose sum is σ = 245717364. Its totient is φ = 163811568.

The previous prime is 204764453. The next prime is 204764467. The reversal of 204764465 is 564467402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564467402 = 2 ⋅282233701.

It can be written as a sum of positive squares in 2 ways, for example, as 145057936 + 59706529 = 12044^2 + 7727^2 .

It is a cyclic number.

It is not a de Polignac number, because 204764465 - 2⁴ = 204764449 is a prime.

It is a super-2 number, since 2×204764465² = 83856972253472450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204764467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20476442 + ... + 20476451.

It is an arithmetic number, because the mean of its divisors is an integer number (61429341).

Almost surely, 2^204764465 is an apocalyptic number.

It is an amenable number.

204764465 is a deficient number, since it is larger than the sum of its proper divisors (40952899).

204764465 is an equidigital number, since it uses as much as digits as its factorization.

204764465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40952898.

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 204764465 is about 14309.5934603328. The cubic root of 204764465 is about 589.4109461284.

The spelling of 204764465 in words is "two hundred four million, seven hundred sixty-four thousand, four hundred sixty-five".