85583256161 has 4 divisors (see below), whose sum is σ = 92166583572. Its totient is φ = 78999928752.

The previous prime is 85583256133. The next prime is 85583256167. The reversal of 85583256161 is 16165238558.

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 8640817936 + 76942438225 = 92956^2 + 277385^2 .

It is a cyclic number.

It is not a de Polignac number, because 85583256161 - 2¹⁸ = 85582994017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85583256167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3291663686 + ... + 3291663711.

It is an arithmetic number, because the mean of its divisors is an integer number (23041645893).

Almost surely, 2^85583256161 is an apocalyptic number.

It is an amenable number.

85583256161 is a deficient number, since it is larger than the sum of its proper divisors (6583327411).

85583256161 is a wasteful number, since it uses less digits than its factorization.

85583256161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6583327410.

The product of its digits is 1728000, while the sum is 50.

The spelling of 85583256161 in words is "eighty-five billion, five hundred eighty-three million, two hundred fifty-six thousand, one hundred sixty-one".