11705878187 has 2 divisors, whose sum is σ = 11705878188. Its totient is φ = 11705878186.

The previous prime is 11705878127. The next prime is 11705878201. The reversal of 11705878187 is 78187850711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11705878187 - 2²² = 11701683883 is a prime.

It is not a weakly prime, because it can be changed into another prime (11705878127) 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 as a sum of consecutive naturals, namely, 5852939093 + 5852939094.

It is an arithmetic number, because the mean of its divisors is an integer number (5852939094).

Almost surely, 2^11705878187 is an apocalyptic number.

11705878187 is a deficient number, since it is larger than the sum of its proper divisors (1).

11705878187 is an equidigital number, since it uses as much as digits as its factorization.

11705878187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 878080, while the sum is 53.

The spelling of 11705878187 in words is "eleven billion, seven hundred five million, eight hundred seventy-eight thousand, one hundred eighty-seven".