11166115109 has 2 divisors, whose sum is σ = 11166115110. Its totient is φ = 11166115108.

The previous prime is 11166115067. The next prime is 11166115139. The reversal of 11166115109 is 90151166111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6467698084 + 4698417025 = 80422^2 + 68545^2 .

It is a cyclic number.

It is not a de Polignac number, because 11166115109 - 2⁸ = 11166114853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11166115139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5583057554 + 5583057555.

It is an arithmetic number, because the mean of its divisors is an integer number (5583057555).

Almost surely, 2^11166115109 is an apocalyptic number.

It is an amenable number.

11166115109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11166115109 is an equidigital number, since it uses as much as digits as its factorization.

11166115109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 32.

The spelling of 11166115109 in words is "eleven billion, one hundred sixty-six million, one hundred fifteen thousand, one hundred nine".