205645016 has 8 divisors (see below), whose sum is σ = 385584420. Its totient is φ = 102822504.

The previous prime is 205645007. The next prime is 205645019. The reversal of 205645016 is 610546502.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 205645016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205645019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12852806 + ... + 12852821.

Almost surely, 2^205645016 is an apocalyptic number.

It is an amenable number.

205645016 is a deficient number, since it is larger than the sum of its proper divisors (179939404).

205645016 is a wasteful number, since it uses less digits than its factorization.

205645016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25705633 (or 25705629 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 205645016 is about 14340.3283086546. The cubic root of 205645016 is about 590.2546214983.

The spelling of 205645016 in words is "two hundred five million, six hundred forty-five thousand, sixteen".