6555561555 has 32 divisors (see below), whose sum is σ = 10616417280. Its totient is φ = 3453866240.

The previous prime is 6555561521. The next prime is 6555561559. The reversal of 6555561555 is 5551655556.

6555561555 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6555561555 - 2⁶ = 6555561491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6555561559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2576614 + ... + 2579156.

It is an arithmetic number, because the mean of its divisors is an integer number (331763040).

Almost surely, 2^6555561555 is an apocalyptic number.

6555561555 is a deficient number, since it is larger than the sum of its proper divisors (4060855725).

6555561555 is a wasteful number, since it uses less digits than its factorization.

6555561555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4571.

The product of its digits is 2812500, while the sum is 48.

The square root of 6555561555 is about 80966.4223922485. The cubic root of 6555561555 is about 1871.5580402644.

The spelling of 6555561555 in words is "six billion, five hundred fifty-five million, five hundred sixty-one thousand, five hundred fifty-five".