6611565051523 has 4 divisors (see below), whose sum is σ = 6611570308048. Its totient is φ = 6611559795000.

The previous prime is 6611565051521. The next prime is 6611565051529. The reversal of 6611565051523 is 3251505651166.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6611565051523 - 2¹ = 6611565051521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6611565051521) 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, 497773 + ... + 3670273.

It is an arithmetic number, because the mean of its divisors is an integer number (1652892577012).

Almost surely, 2^{6611565051523} is an apocalyptic number.

6611565051523 is a deficient number, since it is larger than the sum of its proper divisors (5256525).

6611565051523 is a wasteful number, since it uses less digits than its factorization.

6611565051523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256524.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 6611565051523 in words is "six trillion, six hundred eleven billion, five hundred sixty-five million, fifty-one thousand, five hundred twenty-three".