85438544583457 has 4 divisors (see below), whose sum is σ = 92010740320660. Its totient is φ = 78866348846256.

The previous prime is 85438544583449. The next prime is 85438544583463. The reversal of 85438544583457 is 75438544583458.

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 55670564935441 + 29767979648016 = 7461271^2 + 5456004^2 .

It is a cyclic number.

It is not a de Polignac number, because 85438544583457 - 2³ = 85438544583449 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 85438544583457.

It is not an unprimeable number, because it can be changed into a prime (85438544580457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3286097868582 + ... + 3286097868607.

It is an arithmetic number, because the mean of its divisors is an integer number (23002685080165).

Almost surely, 2^{85438544583457} is an apocalyptic number.

It is an amenable number.

85438544583457 is a deficient number, since it is larger than the sum of its proper divisors (6572195737203).

85438544583457 is a wasteful number, since it uses less digits than its factorization.

85438544583457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6572195737202.

The product of its digits is 5160960000, while the sum is 73.

Subtracting from 85438544583457 its reverse (75438544583458), we obtain a palindrome (9999999999999).

The spelling of 85438544583457 in words is "eighty-five trillion, four hundred thirty-eight billion, five hundred forty-four million, five hundred eighty-three thousand, four hundred fifty-seven".