85440235198 has 4 divisors (see below), whose sum is σ = 128160352800. Its totient is φ = 42720117598.

The previous prime is 85440235187. The next prime is 85440235207. The reversal of 85440235198 is 89153204458.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21360058798 + ... + 21360058801.

It is an arithmetic number, because the mean of its divisors is an integer number (32040088200).

Almost surely, 2^85440235198 is an apocalyptic number.

85440235198 is a deficient number, since it is larger than the sum of its proper divisors (42720117602).

85440235198 is a wasteful number, since it uses less digits than its factorization.

85440235198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42720117601.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 85440235198 in words is "eighty-five billion, four hundred forty million, two hundred thirty-five thousand, one hundred ninety-eight".