11516666571 has 24 divisors (see below), whose sum is σ = 16755828336. Its totient is φ = 7622228160.

The previous prime is 11516666569. The next prime is 11516666597. The reversal of 11516666571 is 17566661511.

It is not a de Polignac number, because 11516666571 - 2¹ = 11516666569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11516666561) 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, 1136236 + ... + 1146326.

It is an arithmetic number, because the mean of its divisors is an integer number (698159514).

Almost surely, 2^11516666571 is an apocalyptic number.

11516666571 is a deficient number, since it is larger than the sum of its proper divisors (5239161765).

11516666571 is a wasteful number, since it uses less digits than its factorization.

11516666571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11003 (or 11000 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The spelling of 11516666571 in words is "eleven billion, five hundred sixteen million, six hundred sixty-six thousand, five hundred seventy-one".