8529413681 has 4 divisors (see below), whose sum is σ = 8604895332. Its totient is φ = 8453932032.

The previous prime is 8529413617. The next prime is 8529413707. The reversal of 8529413681 is 1863149258.

It is a happy number.

8529413681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 589712656 + 7939701025 = 24284^2 + 89105^2 .

It is a cyclic number.

It is not a de Polignac number, because 8529413681 - 2⁶ = 8529413617 is a prime.

It is a super-2 number, since 2×8529413681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8529419681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37740656 + ... + 37740881.

It is an arithmetic number, because the mean of its divisors is an integer number (2151223833).

Almost surely, 2^8529413681 is an apocalyptic number.

It is an amenable number.

8529413681 is a deficient number, since it is larger than the sum of its proper divisors (75481651).

8529413681 is a wasteful number, since it uses less digits than its factorization.

8529413681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75481650.

The product of its digits is 414720, while the sum is 47.

The square root of 8529413681 is about 92354.8248929096. The cubic root of 8529413681 is about 2043.1788898653.

The spelling of 8529413681 in words is "eight billion, five hundred twenty-nine million, four hundred thirteen thousand, six hundred eighty-one".