641605235 has 16 divisors (see below), whose sum is σ = 788659200. Its totient is φ = 500922336.

The previous prime is 641605207. The next prime is 641605297. The reversal of 641605235 is 532506146.

It is a cyclic number.

It is not a de Polignac number, because 641605235 - 2⁸ = 641604979 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 33182 + ... + 48828.

It is an arithmetic number, because the mean of its divisors is an integer number (49291200).

Almost surely, 2^641605235 is an apocalyptic number.

641605235 is a deficient number, since it is larger than the sum of its proper divisors (147053965).

641605235 is a wasteful number, since it uses less digits than its factorization.

641605235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15850.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 641605235 is about 25329.9276548513. The cubic root of 641605235 is about 862.4937690511.

The spelling of 641605235 in words is "six hundred forty-one million, six hundred five thousand, two hundred thirty-five".