11309851855 has 4 divisors (see below), whose sum is σ = 13571822232. Its totient is φ = 9047881480.

The previous prime is 11309851811. The next prime is 11309851877. The reversal of 11309851855 is 55815890311.

11309851855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11309851855 - 2²³ = 11301463247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1130985181 + ... + 1130985190.

It is an arithmetic number, because the mean of its divisors is an integer number (3392955558).

Almost surely, 2^11309851855 is an apocalyptic number.

11309851855 is a deficient number, since it is larger than the sum of its proper divisors (2261970377).

11309851855 is an equidigital number, since it uses as much as digits as its factorization.

11309851855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261970376.

The product of its (nonzero) digits is 216000, while the sum is 46.

The spelling of 11309851855 in words is "eleven billion, three hundred nine million, eight hundred fifty-one thousand, eight hundred fifty-five".