2005456553 has 4 divisors (see below), whose sum is σ = 2020095060. Its totient is φ = 1990818048.

The previous prime is 2005456543. The next prime is 2005456571. The reversal of 2005456553 is 3556545002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1740808729 + 264647824 = 41723^2 + 16268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005456553 - 2¹⁴ = 2005440169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005456543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7319048 + ... + 7319321.

It is an arithmetic number, because the mean of its divisors is an integer number (505023765).

Almost surely, 2^2005456553 is an apocalyptic number.

It is an amenable number.

2005456553 is a deficient number, since it is larger than the sum of its proper divisors (14638507).

2005456553 is a wasteful number, since it uses less digits than its factorization.

2005456553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14638506.

The product of its (nonzero) digits is 90000, while the sum is 35.

The square root of 2005456553 is about 44782.3241134267. The cubic root of 2005456553 is about 1261.0658137785.

The spelling of 2005456553 in words is "two billion, five million, four hundred fifty-six thousand, five hundred fifty-three".