8450643085 has 4 divisors (see below), whose sum is σ = 10140771708. Its totient is φ = 6760514464.

The previous prime is 8450643077. The next prime is 8450643107. The reversal of 8450643085 is 5803460548.

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 4159476036 + 4291167049 = 64494^2 + 65507^2 .

It is a cyclic number.

It is not a de Polignac number, because 8450643085 - 2³ = 8450643077 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845064304 + ... + 845064313.

It is an arithmetic number, because the mean of its divisors is an integer number (2535192927).

Almost surely, 2^8450643085 is an apocalyptic number.

It is an amenable number.

8450643085 is a deficient number, since it is larger than the sum of its proper divisors (1690128623).

8450643085 is a wasteful number, since it uses less digits than its factorization.

8450643085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690128622.

The product of its (nonzero) digits is 460800, while the sum is 43.

The square root of 8450643085 is about 91927.3794089661. The cubic root of 8450643085 is about 2036.8697254361.

The spelling of 8450643085 in words is "eight billion, four hundred fifty million, six hundred forty-three thousand, eighty-five".