11165530521 has 8 divisors (see below), whose sum is σ = 15763101984. Its totient is φ = 7005823040.

The previous prime is 11165530499. The next prime is 11165530549. The reversal of 11165530521 is 12503556111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11165530521 - 2¹⁴ = 11165514137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11165530421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109465935 + ... + 109466036.

It is an arithmetic number, because the mean of its divisors is an integer number (1970387748).

Almost surely, 2^11165530521 is an apocalyptic number.

It is an amenable number.

11165530521 is a deficient number, since it is larger than the sum of its proper divisors (4597571463).

11165530521 is a wasteful number, since it uses less digits than its factorization.

11165530521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218931991.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 11165530521 in words is "eleven billion, one hundred sixty-five million, five hundred thirty thousand, five hundred twenty-one".