2001132645643 has 2 divisors, whose sum is σ = 2001132645644. Its totient is φ = 2001132645642.

The previous prime is 2001132645593. The next prime is 2001132645661. The reversal of 2001132645643 is 3465462311002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001132645643 - 2⁹ = 2001132645131 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001132045643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000566322821 + 1000566322822.

It is an arithmetic number, because the mean of its divisors is an integer number (1000566322822).

Almost surely, 2^{2001132645643} is an apocalyptic number.

2001132645643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001132645643 is an equidigital number, since it uses as much as digits as its factorization.

2001132645643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 2001132645643 its reverse (3465462311002), we get a palindrome (5466594956645).

The spelling of 2001132645643 in words is "two trillion, one billion, one hundred thirty-two million, six hundred forty-five thousand, six hundred forty-three".