204648945 has 16 divisors (see below), whose sum is σ = 329451072. Its totient is φ = 108475200.

The previous prime is 204648937. The next prime is 204648959. The reversal of 204648945 is 549846402.

204648945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204648945 - 2³ = 204648937 is a prime.

It is a super-2 number, since 2×204648945² = 83762381379226050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204648897 and 204648906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39406 + ... + 44295.

It is an arithmetic number, because the mean of its divisors is an integer number (20590692).

Almost surely, 2^204648945 is an apocalyptic number.

It is an amenable number.

204648945 is a deficient number, since it is larger than the sum of its proper divisors (124802127).

204648945 is a wasteful number, since it uses less digits than its factorization.

204648945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83872.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 204648945 is about 14305.5564379719. The cubic root of 204648945 is about 589.3000845085.

The spelling of 204648945 in words is "two hundred four million, six hundred forty-eight thousand, nine hundred forty-five".