8345806581 has 8 divisors (see below), whose sum is σ = 12717419584. Its totient is φ = 4769032320.

The previous prime is 8345806529. The next prime is 8345806589. The reversal of 8345806581 is 1856085438.

8345806581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8345806581 - 2⁶ = 8345806517 is a prime.

It is a super-2 number, since 2×8345806581² (a number of 21 digits) contains 22 as substring.

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 8345806581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8345806589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198709660 + ... + 198709701.

It is an arithmetic number, because the mean of its divisors is an integer number (1589677448).

Almost surely, 2^8345806581 is an apocalyptic number.

It is an amenable number.

8345806581 is a deficient number, since it is larger than the sum of its proper divisors (4371613003).

8345806581 is a wasteful number, since it uses less digits than its factorization.

8345806581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397419371.

The product of its (nonzero) digits is 921600, while the sum is 48.

The square root of 8345806581 is about 91355.3861630501. The cubic root of 8345806581 is about 2028.4116917521.

The spelling of 8345806581 in words is "eight billion, three hundred forty-five million, eight hundred six thousand, five hundred eighty-one".