11505161191 has 2 divisors, whose sum is σ = 11505161192. Its totient is φ = 11505161190.

The previous prime is 11505161149. The next prime is 11505161201. The reversal of 11505161191 is 19116150511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11505161191 - 2⁹ = 11505160679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11505164191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752580595 + 5752580596.

It is an arithmetic number, because the mean of its divisors is an integer number (5752580596).

Almost surely, 2^11505161191 is an apocalyptic number.

11505161191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505161191 is an equidigital number, since it uses as much as digits as its factorization.

11505161191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 31.

The spelling of 11505161191 in words is "eleven billion, five hundred five million, one hundred sixty-one thousand, one hundred ninety-one".