641103811 has 2 divisors, whose sum is σ = 641103812. Its totient is φ = 641103810.

The previous prime is 641103809. The next prime is 641103823. The reversal of 641103811 is 118301146.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641103811 - 2¹ = 641103809 is a prime.

It is a super-2 number, since 2×641103811² = 822028192957447442, which contains 22 as substring.

Together with 641103809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (641103851) by changing a digit.

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 as a sum of consecutive naturals, namely, 320551905 + 320551906.

It is an arithmetic number, because the mean of its divisors is an integer number (320551906).

Almost surely, 2^641103811 is an apocalyptic number.

641103811 is a deficient number, since it is larger than the sum of its proper divisors (1).

641103811 is an equidigital number, since it uses as much as digits as its factorization.

641103811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 641103811 is about 25320.0278633338. The cubic root of 641103811 is about 862.2690266068.

Adding to 641103811 its reverse (118301146), we get a palindrome (759404957).

The spelling of 641103811 in words is "six hundred forty-one million, one hundred three thousand, eight hundred eleven".