11661065185 has 16 divisors (see below), whose sum is σ = 17446165632. Its totient is φ = 7269235200.

The previous prime is 11661065179. The next prime is 11661065201. The reversal of 11661065185 is 58156016611.

It is a happy number.

It is not a de Polignac number, because 11661065185 - 2¹⁵ = 11661032417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15143856 + ... + 15144625.

It is an arithmetic number, because the mean of its divisors is an integer number (1090385352).

Almost surely, 2^11661065185 is an apocalyptic number.

It is an amenable number.

11661065185 is a deficient number, since it is larger than the sum of its proper divisors (5785100447).

11661065185 is a wasteful number, since it uses less digits than its factorization.

11661065185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30288504.

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 11661065185 in words is "eleven billion, six hundred sixty-one million, sixty-five thousand, one hundred eighty-five".