8456479985 has 4 divisors (see below), whose sum is σ = 10147775988. Its totient is φ = 6765183984.

The previous prime is 8456479979. The next prime is 8456479991. The reversal of 8456479985 is 5899746548.

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

It is an interprime number because it is at equal distance from previous prime (8456479979) and next prime (8456479991).

It can be written as a sum of positive squares in 2 ways, for example, as 3926651569 + 4529828416 = 62663^2 + 67304^2 .

It is a cyclic number.

It is not a de Polignac number, because 8456479985 - 2⁸ = 8456479729 is a prime.

It is a super-3 number, since 3×8456479985³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 845647994 + ... + 845648003.

It is an arithmetic number, because the mean of its divisors is an integer number (2536943997).

Almost surely, 2^8456479985 is an apocalyptic number.

It is an amenable number.

8456479985 is a deficient number, since it is larger than the sum of its proper divisors (1691296003).

8456479985 is a wasteful number, since it uses less digits than its factorization.

8456479985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691296002.

The product of its digits is 87091200, while the sum is 65.

The square root of 8456479985 is about 91959.1212713562. The cubic root of 8456479985 is about 2037.3385760931.

The spelling of 8456479985 in words is "eight billion, four hundred fifty-six million, four hundred seventy-nine thousand, nine hundred eighty-five".