842856016913 has 4 divisors (see below), whose sum is σ = 865635909300. Its totient is φ = 820076124528.

The previous prime is 842856016903. The next prime is 842856016969. The reversal of 842856016913 is 319610658248.

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

It can be written as a sum of positive squares in 2 ways, for example, as 450970000849 + 391886016064 = 671543^2 + 626008^2 .

It is a cyclic number.

It is not a de Polignac number, because 842856016913 - 2⁴ = 842856016897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842856016903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11389946138 + ... + 11389946211.

It is an arithmetic number, because the mean of its divisors is an integer number (216408977325).

Almost surely, 2^842856016913 is an apocalyptic number.

It is an amenable number.

842856016913 is a deficient number, since it is larger than the sum of its proper divisors (22779892387).

842856016913 is a wasteful number, since it uses less digits than its factorization.

842856016913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22779892386.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 842856016913 in words is "eight hundred forty-two billion, eight hundred fifty-six million, sixteen thousand, nine hundred thirteen".