8524413681 has 32 divisors (see below), whose sum is σ = 13156888320. Its totient is φ = 4808534016.

The previous prime is 8524413647. The next prime is 8524413691. The reversal of 8524413681 is 1863144258.

It is a happy number.

It is not a de Polignac number, because 8524413681 - 2²⁷ = 8390195953 is a prime.

It is a super-2 number, since 2×8524413681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8524413691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1261945 + ... + 1268681.

It is an arithmetic number, because the mean of its divisors is an integer number (411152760).

Almost surely, 2^8524413681 is an apocalyptic number.

It is an amenable number.

8524413681 is a deficient number, since it is larger than the sum of its proper divisors (4632474639).

8524413681 is a wasteful number, since it uses less digits than its factorization.

8524413681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513.

The product of its digits is 184320, while the sum is 42.

The square root of 8524413681 is about 92327.7514131044. The cubic root of 8524413681 is about 2042.7795700648.

The spelling of 8524413681 in words is "eight billion, five hundred twenty-four million, four hundred thirteen thousand, six hundred eighty-one".