2055655565 has 4 divisors (see below), whose sum is σ = 2466786684. Its totient is φ = 1644524448.

The previous prime is 2055655541. The next prime is 2055655573. The reversal of 2055655565 is 5655565502.

It is a happy number.

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 569013316 + 1486642249 = 23854^2 + 38557^2 .

It is a cyclic number.

It is not a de Polignac number, because 2055655565 - 2¹⁰ = 2055654541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205565552 + ... + 205565561.

It is an arithmetic number, because the mean of its divisors is an integer number (616696671).

Almost surely, 2^2055655565 is an apocalyptic number.

It is an amenable number.

2055655565 is a deficient number, since it is larger than the sum of its proper divisors (411131119).

2055655565 is an equidigital number, since it uses as much as digits as its factorization.

2055655565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411131118.

The product of its (nonzero) digits is 1125000, while the sum is 44.

The square root of 2055655565 is about 45339.3379417918. The cubic root of 2055655565 is about 1271.5012245261.

The spelling of 2055655565 in words is "two billion, fifty-five million, six hundred fifty-five thousand, five hundred sixty-five".