2003841995891 has 2 divisors, whose sum is σ = 2003841995892. Its totient is φ = 2003841995890.

The previous prime is 2003841995783. The next prime is 2003841995917. The reversal of 2003841995891 is 1985991483002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003841995891 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2003841995891.

It is not a weakly prime, because it can be changed into another prime (2003841991891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001920997945 + 1001920997946.

It is an arithmetic number, because the mean of its divisors is an integer number (1001920997946).

Almost surely, 2^{2003841995891} is an apocalyptic number.

2003841995891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003841995891 is an equidigital number, since it uses as much as digits as its factorization.

2003841995891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The spelling of 2003841995891 in words is "two trillion, three billion, eight hundred forty-one million, nine hundred ninety-five thousand, eight hundred ninety-one".