1123661853843 has 16 divisors (see below), whose sum is σ = 1511716279680. Its totient is φ = 742359787904.

The previous prime is 1123661853829. The next prime is 1123661853851. The reversal of 1123661853843 is 3483581663211.

It is a cyclic number.

It is not a de Polignac number, because 1123661853843 - 2⁴ = 1123661853827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123661853883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1881388 + ... + 2405606.

It is an arithmetic number, because the mean of its divisors is an integer number (94482267480).

Almost surely, 2^{1123661853843} is an apocalyptic number.

1123661853843 is a deficient number, since it is larger than the sum of its proper divisors (388054425837).

1123661853843 is a wasteful number, since it uses less digits than its factorization.

1123661853843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530658.

The product of its digits is 2488320, while the sum is 51.

The spelling of 1123661853843 in words is "one trillion, one hundred twenty-three billion, six hundred sixty-one million, eight hundred fifty-three thousand, eight hundred forty-three".