11165111157081 has 24 divisors (see below), whose sum is σ = 17317852030080. Its totient is φ = 6379865762592.

The previous prime is 11165111157071. The next prime is 11165111157089. The reversal of 11165111157081 is 18075111156111.

It is not a de Polignac number, because 11165111157081 - 2¹⁰ = 11165111156057 is a prime.

It is a super-2 number, since 2×11165111157081² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11165111157089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3648640 + ... + 5970158.

It is an arithmetic number, because the mean of its divisors is an integer number (721577167920).

Almost surely, 2^{11165111157081} is an apocalyptic number.

It is an amenable number.

11165111157081 is a deficient number, since it is larger than the sum of its proper divisors (6152740872999).

11165111157081 is a wasteful number, since it uses less digits than its factorization.

11165111157081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354253 (or 2354246 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 39.

The spelling of 11165111157081 in words is "eleven trillion, one hundred sixty-five billion, one hundred eleven million, one hundred fifty-seven thousand, eighty-one".