2001304445543 has 16 divisors (see below), whose sum is σ = 2243822937216. Its totient is φ = 1772807005440.

The previous prime is 2001304445449. The next prime is 2001304445557. The reversal of 2001304445543 is 3455444031002.

It is a cyclic number.

It is not a de Polignac number, because 2001304445543 - 2⁴⁰ = 901792817767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001304405543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28462943 + ... + 28533168.

It is an arithmetic number, because the mean of its divisors is an integer number (140238933576).

Almost surely, 2^{2001304445543} is an apocalyptic number.

2001304445543 is a deficient number, since it is larger than the sum of its proper divisors (242518491673).

2001304445543 is a wasteful number, since it uses less digits than its factorization.

2001304445543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56996234.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 2001304445543 its reverse (3455444031002), we get a palindrome (5456748476545).

The spelling of 2001304445543 in words is "two trillion, one billion, three hundred four million, four hundred forty-five thousand, five hundred forty-three".