11565166616 has 8 divisors (see below), whose sum is σ = 21684687420. Its totient is φ = 5782583304.

The previous prime is 11565166603. The next prime is 11565166633. The reversal of 11565166616 is 61666156511.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722822906 + ... + 722822921.

Almost surely, 2^11565166616 is an apocalyptic number.

It is an amenable number.

11565166616 is a deficient number, since it is larger than the sum of its proper divisors (10119520804).

11565166616 is a wasteful number, since it uses less digits than its factorization.

11565166616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445645833 (or 1445645829 counting only the distinct ones).

The product of its digits is 194400, while the sum is 44.

The spelling of 11565166616 in words is "eleven billion, five hundred sixty-five million, one hundred sixty-six thousand, six hundred sixteen".