85491271073 has 32 divisors (see below), whose sum is σ = 95764328352. Its totient is φ = 75814502400.

The previous prime is 85491271043. The next prime is 85491271091. The reversal of 85491271073 is 37017219458.

It can be written as a sum of positive squares in 16 ways, for example, as 56743051264 + 28748219809 = 238208^2 + 169553^2 .

It is not a de Polignac number, because 85491271073 - 2¹⁰ = 85491270049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85491271003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9451433 + ... + 9460473.

It is an arithmetic number, because the mean of its divisors is an integer number (2992635261).

Almost surely, 2^85491271073 is an apocalyptic number.

It is an amenable number.

85491271073 is a deficient number, since it is larger than the sum of its proper divisors (10273057279).

85491271073 is a wasteful number, since it uses less digits than its factorization.

85491271073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9365.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 85491271073 in words is "eighty-five billion, four hundred ninety-one million, two hundred seventy-one thousand, seventy-three".