8481481985 has 8 divisors (see below), whose sum is σ = 10776471336. Its totient is φ = 6386056960.

The previous prime is 8481481979. The next prime is 8481481993. The reversal of 8481481985 is 5891841848.

It can be written as a sum of positive squares in 4 ways, for example, as 2821628161 + 5659853824 = 53119^2 + 75232^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-8481481985 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8481481985.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49890986 + ... + 49891155.

It is an arithmetic number, because the mean of its divisors is an integer number (1347058917).

Almost surely, 2^8481481985 is an apocalyptic number.

8481481985 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8481481985 is a deficient number, since it is larger than the sum of its proper divisors (2294989351).

8481481985 is a wasteful number, since it uses less digits than its factorization.

8481481985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99782163.

The product of its digits is 2949120, while the sum is 56.

The square root of 8481481985 is about 92094.9617785903. The cubic root of 8481481985 is about 2039.3444312353.

The spelling of 8481481985 in words is "eight billion, four hundred eighty-one million, four hundred eighty-one thousand, nine hundred eighty-five".