641218606 has 16 divisors (see below), whose sum is σ = 1121666400. Its totient is φ = 274807680.

The previous prime is 641218577. The next prime is 641218637. The reversal of 641218606 is 606812146.

It is a super-2 number, since 2×641218606² = 822322601361166472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466675 + ... + 468046.

It is an arithmetic number, because the mean of its divisors is an integer number (70104150).

Almost surely, 2^641218606 is an apocalyptic number.

641218606 is a deficient number, since it is larger than the sum of its proper divisors (480447794).

641218606 is an equidigital number, since it uses as much as digits as its factorization.

641218606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934744 (or 934730 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 641218606 is about 25322.2946432585. The cubic root of 641218606 is about 862.3204890292.

It can be divided in two parts, 64121 and 8606, that added together give a palindrome (72727).

The spelling of 641218606 in words is "six hundred forty-one million, two hundred eighteen thousand, six hundred six".