1123855643868 has 24 divisors (see below), whose sum is σ = 2712755003280. Its totient is φ = 361700666880.

The previous prime is 1123855643861. The next prime is 1123855643873. The reversal of 1123855643868 is 8683465583211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123855643861) 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 7 ways as a sum of consecutive naturals, for example, 1614734773 + ... + 1614735468.

It is an arithmetic number, because the mean of its divisors is an integer number (113031458470).

Almost surely, 2^{1123855643868} is an apocalyptic number.

It is an amenable number.

1123855643868 is an abundant number, since it is smaller than the sum of its proper divisors (1588899359412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123855643868 is a wasteful number, since it uses less digits than its factorization.

1123855643868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229470277 (or 3229470275 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 60.

The spelling of 1123855643868 in words is "one trillion, one hundred twenty-three billion, eight hundred fifty-five million, six hundred forty-three thousand, eight hundred sixty-eight".