8531477985 has 16 divisors (see below), whose sum is σ = 13651724736. Its totient is φ = 4549668288.

The previous prime is 8531477971. The next prime is 8531478037. The reversal of 8531477985 is 5897741358.

It is a happy number.

8531477985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8531477985 - 2³⁰ = 7457736161 is a prime.

It is a super-2 number, since 2×8531477985² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173742 + ... + 217368.

It is an arithmetic number, because the mean of its divisors is an integer number (853232796).

Almost surely, 2^8531477985 is an apocalyptic number.

It is an amenable number.

8531477985 is a deficient number, since it is larger than the sum of its proper divisors (5120246751).

8531477985 is a wasteful number, since it uses less digits than its factorization.

8531477985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56672.

The product of its digits is 8467200, while the sum is 57.

The square root of 8531477985 is about 92366.0001569842. Note that the first 3 decimals coincide. The cubic root of 8531477985 is about 2043.3437078429.

The spelling of 8531477985 in words is "eight billion, five hundred thirty-one million, four hundred seventy-seven thousand, nine hundred eighty-five".