641852845 has 4 divisors (see below), whose sum is σ = 770223420. Its totient is φ = 513482272.

The previous prime is 641852839. The next prime is 641852921. The reversal of 641852845 is 548258146.

641852845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101243844 + 540609001 = 10062^2 + 23251^2 .

It is a cyclic number.

It is not a de Polignac number, because 641852845 - 2³ = 641852837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64185280 + ... + 64185289.

It is an arithmetic number, because the mean of its divisors is an integer number (192555855).

Almost surely, 2^641852845 is an apocalyptic number.

It is an amenable number.

641852845 is a deficient number, since it is larger than the sum of its proper divisors (128370575).

641852845 is a wasteful number, since it uses less digits than its factorization.

641852845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128370574.

The product of its digits is 307200, while the sum is 43.

The square root of 641852845 is about 25334.8148799236. The cubic root of 641852845 is about 862.6047067449.

The spelling of 641852845 in words is "six hundred forty-one million, eight hundred fifty-two thousand, eight hundred forty-five".