7805505555 has 24 divisors (see below), whose sum is σ = 13844186928. Its totient is φ = 4066122816.

The previous prime is 7805505497. The next prime is 7805505571. The reversal of 7805505555 is 5555055087.

It is a happy number.

It is not a de Polignac number, because 7805505555 - 2¹¹ = 7805503507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7805505555.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2014992 + ... + 2018861.

It is an arithmetic number, because the mean of its divisors is an integer number (576841122).

Almost surely, 2^7805505555 is an apocalyptic number.

7805505555 is a deficient number, since it is larger than the sum of its proper divisors (6038681373).

7805505555 is a wasteful number, since it uses less digits than its factorization.

7805505555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033907 (or 4033904 counting only the distinct ones).

The product of its (nonzero) digits is 875000, while the sum is 45.

The square root of 7805505555 is about 88348.7722325557. The cubic root of 7805505555 is about 1983.6589787223.

The spelling of 7805505555 in words is "seven billion, eight hundred five million, five hundred five thousand, five hundred fifty-five".