205604465 has 16 divisors (see below), whose sum is σ = 273571776. Its totient is φ = 147076800.

The previous prime is 205604447. The next prime is 205604473. The reversal of 205604465 is 564406502.

It is not a de Polignac number, because 205604465 - 2⁸ = 205604209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27287 + ... + 33996.

It is an arithmetic number, because the mean of its divisors is an integer number (17098236).

Almost surely, 2^205604465 is an apocalyptic number.

It is an amenable number.

205604465 is a deficient number, since it is larger than the sum of its proper divisors (67967311).

205604465 is a wasteful number, since it uses less digits than its factorization.

205604465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61360.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 205604465 is about 14338.9143591835. The cubic root of 205604465 is about 590.2158216462.

The spelling of 205604465 in words is "two hundred five million, six hundred four thousand, four hundred sixty-five".