6556115655 has 24 divisors (see below), whose sum is σ = 11671070112. Its totient is φ = 3402091584.

The previous prime is 6556115653. The next prime is 6556115659. The reversal of 6556115655 is 5565116556.

It is not a de Polignac number, because 6556115655 - 2¹ = 6556115653 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 6556115655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556115653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1967139 + ... + 1970468.

It is an arithmetic number, because the mean of its divisors is an integer number (486294588).

Almost surely, 2^6556115655 is an apocalyptic number.

6556115655 is a deficient number, since it is larger than the sum of its proper divisors (5114954457).

6556115655 is a wasteful number, since it uses less digits than its factorization.

6556115655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937655 (or 3937652 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 6556115655 is about 80969.8441087792. The cubic root of 6556115655 is about 1871.6107690853.

Subtracting from 6556115655 its reverse (5565116556), we obtain a palindrome (990999099).

The spelling of 6556115655 in words is "six billion, five hundred fifty-six million, one hundred fifteen thousand, six hundred fifty-five".