2005404550493 has 2 divisors, whose sum is σ = 2005404550494. Its totient is φ = 2005404550492.

The previous prime is 2005404550489. The next prime is 2005404550559. The reversal of 2005404550493 is 3940554045002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1836941094244 + 168463456249 = 1355338^2 + 410443^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005404550493 - 2² = 2005404550489 is a prime.

It is a super-2 number, since 2×2005404550493² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2005404550493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005404552493) 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, 1002702275246 + 1002702275247.

It is an arithmetic number, because the mean of its divisors is an integer number (1002702275247).

Almost surely, 2^{2005404550493} is an apocalyptic number.

It is an amenable number.

2005404550493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005404550493 is an equidigital number, since it uses as much as digits as its factorization.

2005404550493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 2005404550493 its reverse (3940554045002), we get a palindrome (5945958595495).

The spelling of 2005404550493 in words is "two trillion, five billion, four hundred four million, five hundred fifty thousand, four hundred ninety-three".