2005444523543 has 4 divisors (see below), whose sum is σ = 2059645726920. Its totient is φ = 1951243320168.

The previous prime is 2005444523461. The next prime is 2005444523561. The reversal of 2005444523543 is 3453254445002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2005444523543 - 2¹⁰ = 2005444522519 is a prime.

It is a super-2 number, since 2×2005444523543² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2005444523543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005444520543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27100601633 + ... + 27100601706.

It is an arithmetic number, because the mean of its divisors is an integer number (514911431730).

Almost surely, 2^{2005444523543} is an apocalyptic number.

2005444523543 is a deficient number, since it is larger than the sum of its proper divisors (54201203377).

2005444523543 is an equidigital number, since it uses as much as digits as its factorization.

2005444523543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54201203376.

The product of its (nonzero) digits is 1152000, while the sum is 41.

Adding to 2005444523543 its reverse (3453254445002), we get a palindrome (5458698968545).

The spelling of 2005444523543 in words is "two trillion, five billion, four hundred forty-four million, five hundred twenty-three thousand, five hundred forty-three".