4001811871 has 2 divisors, whose sum is σ = 4001811872. Its totient is φ = 4001811870.

The previous prime is 4001811857. The next prime is 4001811907. The reversal of 4001811871 is 1781181004.

4001811871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4001811871 - 2²⁵ = 3968257439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4001811811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000905935 + 2000905936.

It is an arithmetic number, because the mean of its divisors is an integer number (2000905936).

Almost surely, 2^4001811871 is an apocalyptic number.

4001811871 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001811871 is an equidigital number, since it uses as much as digits as its factorization.

4001811871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 31.

The square root of 4001811871 is about 63259.8756796123. The cubic root of 4001811871 is about 1587.6406962824.

Adding to 4001811871 its reverse (1781181004), we get a palindrome (5782992875).

The spelling of 4001811871 in words is "four billion, one million, eight hundred eleven thousand, eight hundred seventy-one".