206504645 has 8 divisors (see below), whose sum is σ = 248981280. Its totient is φ = 164419920.

The previous prime is 206504591. The next prime is 206504677. The reversal of 206504645 is 546405602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-206504645 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96815 + ... + 98924.

It is an arithmetic number, because the mean of its divisors is an integer number (31122660).

Almost surely, 2^206504645 is an apocalyptic number.

It is an amenable number.

206504645 is a deficient number, since it is larger than the sum of its proper divisors (42476635).

206504645 is a wasteful number, since it uses less digits than its factorization.

206504645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195955.

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

The square root of 206504645 is about 14370.2694825115. The cubic root of 206504645 is about 591.0759310100.

The spelling of 206504645 in words is "two hundred six million, five hundred four thousand, six hundred forty-five".