85478539241 has 4 divisors (see below), whose sum is σ = 85479189972. Its totient is φ = 85477888512.

The previous prime is 85478539213. The next prime is 85478539243. The reversal of 85478539241 is 14293587458.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14293587458 = 2 ⋅7146793729.

It can be written as a sum of positive squares in 2 ways, for example, as 60272214016 + 25206325225 = 245504^2 + 158765^2 .

It is a cyclic number.

It is not a de Polignac number, because 85478539241 - 2¹⁰ = 85478538217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85478539243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51476 + ... + 416661.

It is an arithmetic number, because the mean of its divisors is an integer number (21369797493).

Almost surely, 2^85478539241 is an apocalyptic number.

It is an amenable number.

85478539241 is a deficient number, since it is larger than the sum of its proper divisors (650731).

85478539241 is a wasteful number, since it uses less digits than its factorization.

85478539241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650730.

The product of its digits is 9676800, while the sum is 56.

The spelling of 85478539241 in words is "eighty-five billion, four hundred seventy-eight million, five hundred thirty-nine thousand, two hundred forty-one".