85807843640161 has 4 divisors (see below), whose sum is σ = 85810429882800. Its totient is φ = 85805257397524.

The previous prime is 85807843640153. The next prime is 85807843640173. The reversal of 85807843640161 is 16104634870858.

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 85807843640161 - 2³ = 85807843640153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85807843640161.

It is not an unprimeable number, because it can be changed into a prime (85807843649161) 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 3 ways as a sum of consecutive naturals, for example, 1293071551 + ... + 1293137908.

It is an arithmetic number, because the mean of its divisors is an integer number (21452607470700).

Almost surely, 2^{85807843640161} is an apocalyptic number.

It is an amenable number.

85807843640161 is a deficient number, since it is larger than the sum of its proper divisors (2586242639).

85807843640161 is a wasteful number, since it uses less digits than its factorization.

85807843640161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586242638.

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 85807843640161 in words is "eighty-five trillion, eight hundred seven billion, eight hundred forty-three million, six hundred forty thousand, one hundred sixty-one".