85447981825 has 12 divisors (see below), whose sum is σ = 106130072320. Its totient is φ = 68245756560.

The previous prime is 85447981769. The next prime is 85447981847. The reversal of 85447981825 is 52818974458.

It is a happy number.

It is not a de Polignac number, because 85447981825 - 2¹¹ = 85447979777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2800245 + ... + 2830594.

Almost surely, 2^85447981825 is an apocalyptic number.

It is an amenable number.

85447981825 is a deficient number, since it is larger than the sum of its proper divisors (20682090495).

85447981825 is a wasteful number, since it uses less digits than its factorization.

85447981825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5631456 (or 5631451 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 61.

The spelling of 85447981825 in words is "eighty-five billion, four hundred forty-seven million, nine hundred eighty-one thousand, eight hundred twenty-five".