85505344673 has 4 divisors (see below), whose sum is σ = 97720393920. Its totient is φ = 73290295428.

The previous prime is 85505344649. The next prime is 85505344747. The reversal of 85505344673 is 37644350558.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37644350558 = 2 ⋅18822175279.

It is not a de Polignac number, because 85505344673 - 2²² = 85501150369 is a prime.

It is a super-2 number, since 2×85505344673² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85505344633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6107524613 + ... + 6107524626.

It is an arithmetic number, because the mean of its divisors is an integer number (24430098480).

Almost surely, 2^85505344673 is an apocalyptic number.

It is an amenable number.

85505344673 is a deficient number, since it is larger than the sum of its proper divisors (12215049247).

85505344673 is a wasteful number, since it uses less digits than its factorization.

85505344673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12215049246.

The product of its (nonzero) digits is 6048000, while the sum is 50.

The spelling of 85505344673 in words is "eighty-five billion, five hundred five million, three hundred forty-four thousand, six hundred seventy-three".