11161156611 has 16 divisors (see below), whose sum is σ = 16318535040. Its totient is φ = 6729285120.

The previous prime is 11161156607. The next prime is 11161156637. The reversal of 11161156611 is 11665116111.

It is not a de Polignac number, because 11161156611 - 2² = 11161156607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11161116611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869841 + ... + 882578.

It is an arithmetic number, because the mean of its divisors is an integer number (1019908440).

Almost surely, 2^11161156611 is an apocalyptic number.

11161156611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11161156611 is a deficient number, since it is larger than the sum of its proper divisors (5157378429).

11161156611 is a wasteful number, since it uses less digits than its factorization.

11161156611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752626.

The product of its digits is 1080, while the sum is 30.

The spelling of 11161156611 in words is "eleven billion, one hundred sixty-one million, one hundred fifty-six thousand, six hundred eleven".