2005505555 has 16 divisors (see below), whose sum is σ = 2574452160. Its totient is φ = 1494454272.

The previous prime is 2005505549. The next prime is 2005505563. The reversal of 2005505555 is 5555055002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005505555 is a prime.

It is a super-2 number, since 2×2005505555² = 8044105062271716050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113375 + ... + 129864.

It is an arithmetic number, because the mean of its divisors is an integer number (160903260).

Almost surely, 2^2005505555 is an apocalyptic number.

2005505555 is a deficient number, since it is larger than the sum of its proper divisors (568946605).

2005505555 is a wasteful number, since it uses less digits than its factorization.

2005505555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243358.

The product of its (nonzero) digits is 31250, while the sum is 32.

The square root of 2005505555 is about 44782.8712232702. The cubic root of 2005505555 is about 1261.0760847969.

The spelling of 2005505555 in words is "two billion, five million, five hundred five thousand, five hundred fifty-five".