842585091851 has 4 divisors (see below), whose sum is σ = 842661100512. Its totient is φ = 842509083192.

The previous prime is 842585091833. The next prime is 842585091863. The reversal of 842585091851 is 158190585248.

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

It is a cyclic number.

It is not a de Polignac number, because 842585091851 - 2⁶ = 842585091787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842585091811) 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, 37987700 + ... + 38009873.

It is an arithmetic number, because the mean of its divisors is an integer number (210665275128).

Almost surely, 2^842585091851 is an apocalyptic number.

842585091851 is a deficient number, since it is larger than the sum of its proper divisors (76008661).

842585091851 is a wasteful number, since it uses less digits than its factorization.

842585091851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76008660.

The product of its (nonzero) digits is 4608000, while the sum is 56.

The spelling of 842585091851 in words is "eight hundred forty-two billion, five hundred eighty-five million, ninety-one thousand, eight hundred fifty-one".