2005705655 has 8 divisors (see below), whose sum is σ = 2407276032. Its totient is φ = 1604278368.

The previous prime is 2005705633. The next prime is 2005705687. The reversal of 2005705655 is 5565075002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2005705655 - 2¹² = 2005701559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039 + ... + 63368.

It is an arithmetic number, because the mean of its divisors is an integer number (300909504).

Almost surely, 2^2005705655 is an apocalyptic number.

2005705655 is a deficient number, since it is larger than the sum of its proper divisors (401570377).

2005705655 is an equidigital number, since it uses as much as digits as its factorization.

2005705655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71545.

The product of its (nonzero) digits is 52500, while the sum is 35.

The square root of 2005705655 is about 44785.1052806622. The cubic root of 2005705655 is about 1261.1180248341.

The spelling of 2005705655 in words is "two billion, five million, seven hundred five thousand, six hundred fifty-five".