849435673971 has 4 divisors (see below), whose sum is σ = 1132580898632. Its totient is φ = 566290449312.

The previous prime is 849435673969. The next prime is 849435673981. The reversal of 849435673971 is 179376534948.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 849435673971 - 2¹ = 849435673969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849435673981) 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, 141572612326 + ... + 141572612331.

It is an arithmetic number, because the mean of its divisors is an integer number (283145224658).

Almost surely, 2^849435673971 is an apocalyptic number.

849435673971 is a deficient number, since it is larger than the sum of its proper divisors (283145224661).

849435673971 is a wasteful number, since it uses less digits than its factorization.

849435673971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283145224660.

The product of its digits is 137168640, while the sum is 66.

The spelling of 849435673971 in words is "eight hundred forty-nine billion, four hundred thirty-five million, six hundred seventy-three thousand, nine hundred seventy-one".