8604865681 has 4 divisors (see below), whose sum is σ = 8657656432. Its totient is φ = 8552074932.

The previous prime is 8604865667. The next prime is 8604865699. The reversal of 8604865681 is 1865684068.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8604865681 - 2²⁵ = 8571311249 is a prime.

It is a super-2 number, since 2×8604865681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8604865651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26395131 + ... + 26395456.

It is an arithmetic number, because the mean of its divisors is an integer number (2164414108).

Almost surely, 2^8604865681 is an apocalyptic number.

It is an amenable number.

8604865681 is a deficient number, since it is larger than the sum of its proper divisors (52790751).

8604865681 is a wasteful number, since it uses less digits than its factorization.

8604865681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52790750.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The square root of 8604865681 is about 92762.4152391474. The cubic root of 8604865681 is about 2049.1859294759.

The spelling of 8604865681 in words is "eight billion, six hundred four million, eight hundred sixty-five thousand, six hundred eighty-one".