8418442685 has 4 divisors (see below), whose sum is σ = 10102131228. Its totient is φ = 6734754144.

The previous prime is 8418442667. The next prime is 8418442757. The reversal of 8418442685 is 5862448148.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6127288729 + 2291153956 = 78277^2 + 47866^2 .

It is a cyclic number.

It is not a de Polignac number, because 8418442685 - 2⁶ = 8418442621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841844264 + ... + 841844273.

It is an arithmetic number, because the mean of its divisors is an integer number (2525532807).

Almost surely, 2^8418442685 is an apocalyptic number.

It is an amenable number.

8418442685 is a deficient number, since it is larger than the sum of its proper divisors (1683688543).

8418442685 is a wasteful number, since it uses less digits than its factorization.

8418442685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683688542.

The product of its digits is 1966080, while the sum is 50.

The square root of 8418442685 is about 91752.0718294688. The cubic root of 8418442685 is about 2034.2793307662.

The spelling of 8418442685 in words is "eight billion, four hundred eighteen million, four hundred forty-two thousand, six hundred eighty-five".