641004811 has 4 divisors (see below), whose sum is σ = 643664824. Its totient is φ = 638344800.

The previous prime is 641004799. The next prime is 641004823. The reversal of 641004811 is 118400146.

641004811 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 is an interprime number because it is at equal distance from previous prime (641004799) and next prime (641004823).

It is a cyclic number.

It is not a de Polignac number, because 641004811 - 2¹³ = 640996619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641001811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1329645 + ... + 1330126.

It is an arithmetic number, because the mean of its divisors is an integer number (160916206).

Almost surely, 2^641004811 is an apocalyptic number.

641004811 is a deficient number, since it is larger than the sum of its proper divisors (2660013).

641004811 is a wasteful number, since it uses less digits than its factorization.

641004811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660012.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 641004811 is about 25318.0728137037. The cubic root of 641004811 is about 862.2246401249.

Adding to 641004811 its reverse (118400146), we get a palindrome (759404957).

The spelling of 641004811 in words is "six hundred forty-one million, four thousand, eight hundred eleven".