11665015011 has 48 divisors (see below), whose sum is σ = 18837262080. Its totient is φ = 7170988320.

The previous prime is 11665015009. The next prime is 11665015027. The reversal of 11665015011 is 11051056611.

11665015011 is a `hidden beast` number, since 1 + 1 + 6 + 650 + 1 + 5 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 11665015011 - 2¹ = 11665015009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11665015031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5719930 + ... + 5721968.

It is an arithmetic number, because the mean of its divisors is an integer number (392442960).

Almost surely, 2^11665015011 is an apocalyptic number.

11665015011 is a deficient number, since it is larger than the sum of its proper divisors (7172247069).

11665015011 is a wasteful number, since it uses less digits than its factorization.

11665015011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878 (or 3866 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 11665015011 in words is "eleven billion, six hundred sixty-five million, fifteen thousand, eleven".