854243773161 has 4 divisors (see below), whose sum is σ = 1138991697552. Its totient is φ = 569495848772.

The previous prime is 854243773133. The next prime is 854243773177. The reversal of 854243773161 is 161377342458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 854243773161 - 2³⁸ = 579365866217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (854243773861) 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, 142373962191 + ... + 142373962196.

It is an arithmetic number, because the mean of its divisors is an integer number (284747924388).

Almost surely, 2^854243773161 is an apocalyptic number.

It is an amenable number.

854243773161 is a deficient number, since it is larger than the sum of its proper divisors (284747924391).

854243773161 is a wasteful number, since it uses less digits than its factorization.

854243773161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284747924390.

The product of its digits is 3386880, while the sum is 51.

The spelling of 854243773161 in words is "eight hundred fifty-four billion, two hundred forty-three million, seven hundred seventy-three thousand, one hundred sixty-one".