11999223685 has 16 divisors (see below), whose sum is σ = 14678672112. Its totient is φ = 9413913600.

The previous prime is 11999223683. The next prime is 11999223737. The reversal of 11999223685 is 58632299911.

It can be written as a sum of positive squares in 8 ways, for example, as 3467560996 + 8531662689 = 58886^2 + 92367^2 .

It is not a de Polignac number, because 11999223685 - 2¹ = 11999223683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999223683) 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 in 15 ways as a sum of consecutive naturals, for example, 44415 + ... + 161155.

It is an arithmetic number, because the mean of its divisors is an integer number (917417007).

Almost surely, 2^11999223685 is an apocalyptic number.

It is an amenable number.

11999223685 is a deficient number, since it is larger than the sum of its proper divisors (2679448427).

11999223685 is a wasteful number, since it uses less digits than its factorization.

11999223685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117144.

The product of its digits is 2099520, while the sum is 55.

The spelling of 11999223685 in words is "eleven billion, nine hundred ninety-nine million, two hundred twenty-three thousand, six hundred eighty-five".