641650205 has 32 divisors (see below), whose sum is σ = 940681728. Its totient is φ = 410572800.

The previous prime is 641650187. The next prime is 641650211. The reversal of 641650205 is 502056146.

It is not a de Polignac number, because 641650205 - 2¹⁰ = 641649181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23285 + ... + 42725.

It is an arithmetic number, because the mean of its divisors is an integer number (29396304).

Almost surely, 2^641650205 is an apocalyptic number.

It is an amenable number.

641650205 is a deficient number, since it is larger than the sum of its proper divisors (299031523).

641650205 is a wasteful number, since it uses less digits than its factorization.

641650205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19517.

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

The square root of 641650205 is about 25330.8153244225. The cubic root of 641650205 is about 862.5139192601.

The spelling of 641650205 in words is "six hundred forty-one million, six hundred fifty thousand, two hundred five".