11156166109 has 24 divisors (see below), whose sum is σ = 12516386400. Its totient is φ = 9858921600.

The previous prime is 11156166097. The next prime is 11156166121. The reversal of 11156166109 is 90166165111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11156166097) and next prime (11156166121).

It is not a de Polignac number, because 11156166109 - 2²⁵ = 11122611677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156166149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5313942 + ... + 5316040.

It is an arithmetic number, because the mean of its divisors is an integer number (521516100).

Almost surely, 2^11156166109 is an apocalyptic number.

It is an amenable number.

11156166109 is a deficient number, since it is larger than the sum of its proper divisors (1360220291).

11156166109 is an equidigital number, since it uses as much as digits as its factorization.

11156166109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 37.

The spelling of 11156166109 in words is "eleven billion, one hundred fifty-six million, one hundred sixty-six thousand, one hundred nine".