11912775155 has 16 divisors (see below), whose sum is σ = 14481645024. Its totient is φ = 9406540800.

The previous prime is 11912775151. The next prime is 11912775163. The reversal of 11912775155 is 55157721911.

It is a happy number.

11912775155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11912775155 - 2² = 11912775151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11912775151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147980 + ... + 213830.

It is an arithmetic number, because the mean of its divisors is an integer number (905102814).

Almost surely, 2^11912775155 is an apocalyptic number.

11912775155 is a deficient number, since it is larger than the sum of its proper divisors (2568869869).

11912775155 is an equidigital number, since it uses as much as digits as its factorization.

11912775155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66326.

The product of its digits is 110250, while the sum is 44.

The spelling of 11912775155 in words is "eleven billion, nine hundred twelve million, seven hundred seventy-five thousand, one hundred fifty-five".