1655565655 has 16 divisors (see below), whose sum is σ = 2105465184. Its totient is φ = 1245404160.

The previous prime is 1655565643. The next prime is 1655565673. The reversal of 1655565655 is 5565655561.

It is not a de Polignac number, because 1655565655 - 2²⁹ = 1118694743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1655565599 and 1655565608.

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 15 ways as a sum of consecutive naturals, for example, 91219 + ... + 107851.

It is an arithmetic number, because the mean of its divisors is an integer number (131591574).

Almost surely, 2^1655565655 is an apocalyptic number.

1655565655 is a deficient number, since it is larger than the sum of its proper divisors (449899529).

1655565655 is a wasteful number, since it uses less digits than its factorization.

1655565655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17826.

The product of its digits is 3375000, while the sum is 49.

The square root of 1655565655 is about 40688.6428257321. The cubic root of 1655565655 is about 1182.9928945067.

The spelling of 1655565655 in words is "one billion, six hundred fifty-five million, five hundred sixty-five thousand, six hundred fifty-five".