641600285 has 8 divisors (see below), whose sum is σ = 780467640. Its totient is φ = 506248704.

The previous prime is 641600237. The next prime is 641600299. The reversal of 641600285 is 582006146.

641600285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1965604 + 639634681 = 1402^2 + 25291^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 641600285 - 2²⁸ = 373164829 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, 878540 + ... + 879269.

It is an arithmetic number, because the mean of its divisors is an integer number (97558455).

Almost surely, 2^641600285 is an apocalyptic number.

It is an amenable number.

641600285 is a deficient number, since it is larger than the sum of its proper divisors (138867355).

641600285 is a wasteful number, since it uses less digits than its factorization.

641600285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757887.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 641600285 is about 25329.8299441587. The cubic root of 641600285 is about 862.4915509919.

The spelling of 641600285 in words is "six hundred forty-one million, six hundred thousand, two hundred eighty-five".