8684535681 has 6 divisors (see below), whose sum is σ = 12544329330. Its totient is φ = 5789690448.

The previous prime is 8684535667. The next prime is 8684535683. The reversal of 8684535681 is 1865354868.

8684535681 is a `hidden beast` number, since 8 + 68 + 453 + 56 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8577723456 + 106812225 = 92616^2 + 10335^2 .

It is not a de Polignac number, because 8684535681 - 2⁶ = 8684535617 is a prime.

It is a super-2 number, since 2×8684535681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8684535683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 482474196 + ... + 482474213.

It is an arithmetic number, because the mean of its divisors is an integer number (2090721555).

Almost surely, 2^8684535681 is an apocalyptic number.

It is an amenable number.

8684535681 is a deficient number, since it is larger than the sum of its proper divisors (3859793649).

8684535681 is a wasteful number, since it uses less digits than its factorization.

8684535681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964948415 (or 964948412 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The square root of 8684535681 is about 93190.8562091797. The cubic root of 8684535681 is about 2055.4907872836.

The spelling of 8684535681 in words is "eight billion, six hundred eighty-four million, five hundred thirty-five thousand, six hundred eighty-one".