6555556511111 has 4 divisors (see below), whose sum is σ = 6732733714152. Its totient is φ = 6378379308072.

The previous prime is 6555556511093. The next prime is 6555556511117. The reversal of 6555556511111 is 1111156555556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6555556511111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555556511117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88588601465 + ... + 88588601538.

It is an arithmetic number, because the mean of its divisors is an integer number (1683183428538).

Almost surely, 2^{6555556511111} is an apocalyptic number.

6555556511111 is a deficient number, since it is larger than the sum of its proper divisors (177177203041).

6555556511111 is a wasteful number, since it uses less digits than its factorization.

6555556511111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177177203040.

The product of its digits is 562500, while the sum is 47.

The spelling of 6555556511111 in words is "six trillion, five hundred fifty-five billion, five hundred fifty-six million, five hundred eleven thousand, one hundred eleven".